Include accolade in bipartite graph to group nodes together

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











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I want to include accolades in my bipartite graph to show that nodes belong to a certain group. With the code below I created the following bipartite graph:



beginfigure[H]
centering
definecolormyblueRGB80,80,160
definecolormygreenRGB80,160,80
begintikzpicture[thick,
 every node/.style=draw,circle,
 fsnode/.style=fill=myblue,
 ssnode/.style=fill=mygreen,
 every fit/.style=ellipse,draw,inner sep=-2pt,text width=2cm,
 ->,shorten >= 3pt,shorten <= 3pt
]
% the vertices of P
beginscope[start chain=going below,node distance=10mm]
 node[fsnode,on chain] (f1) [label=left: $p_1$] ;
 node[fsnode,on chain] (f2) [label=left: $p_2$] ;
 node[fsnode,on chain] (f3) [label=left: ] ;
 node[fsnode,on chain] (f4) [label=left: $p_n$] ;
endscope

% the vertices of L
beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
 node[ssnode,on chain] (s1) [label=right: $l_1$] ;
 node[ssnode,on chain] (s2) [label=right: $l_2$] ;
 node[ssnode,on chain] (s3) [label=right: ] ;
 node[ssnode,on chain] (s4) [label=right: $l_m$] ;
endscope

% the set P
node [myblue,fit=(f1) (f4),label=above:$Products$] ;
% the set L
node [mygreen,fit=(s1) (s4),label=above:$Locations$] ;
% the edges
draw[ultra thin,dashed,-] (f2) -- (f3);
draw[ultra thin,dashed,-] (f3) -- (f4);
draw[ultra thin,dashed,-] (s2) -- (s3);
draw[ultra thin,dashed,-] (s3) -- (s4);
draw[-,dotted] (f1) -- (s1);
draw[-,dotted] (f1) -- (s2);
draw[-,dotted] (f1) -- (s3);
draw[-,dotted] (f1) -- (s4);
draw[-,dotted] (f2) -- (s1);
draw[-,dotted] (f2) -- (s2);
draw[-,dotted] (f2) -- (s3);
draw[-,dotted] (f2) -- (s4);
draw[-,dotted] (f3) -- (s1);
draw[-,dotted] (f3) -- (s2);
draw[-,dotted] (f3) -- (s3);
draw[-,dotted] (f3) -- (s4);
draw[-,dotted] (f4) -- (s1);
draw[-,dotted] (f4) -- (s2);
draw[-,dotted] (f4) -- (s3);
draw[-,dotted] (f4) -- (s4);
endtikzpicture
endfigure


This induces the image:
enter image description here



But what I would like is the following image:
enter image description here



What code do I have to add to make use of accolades or something simular?






tikz-pgf graphs







share|improve this question

























    up vote
    7
    down vote

    favorite












    I want to include accolades in my bipartite graph to show that nodes belong to a certain group. With the code below I created the following bipartite graph:



    beginfigure[H]
    centering
    definecolormyblueRGB80,80,160
    definecolormygreenRGB80,160,80
    begintikzpicture[thick,
     every node/.style=draw,circle,
     fsnode/.style=fill=myblue,
     ssnode/.style=fill=mygreen,
     every fit/.style=ellipse,draw,inner sep=-2pt,text width=2cm,
     ->,shorten >= 3pt,shorten <= 3pt
    ]
    % the vertices of P
    beginscope[start chain=going below,node distance=10mm]
     node[fsnode,on chain] (f1) [label=left: $p_1$] ;
     node[fsnode,on chain] (f2) [label=left: $p_2$] ;
     node[fsnode,on chain] (f3) [label=left: ] ;
     node[fsnode,on chain] (f4) [label=left: $p_n$] ;
    endscope

    % the vertices of L
    beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
     node[ssnode,on chain] (s1) [label=right: $l_1$] ;
     node[ssnode,on chain] (s2) [label=right: $l_2$] ;
     node[ssnode,on chain] (s3) [label=right: ] ;
     node[ssnode,on chain] (s4) [label=right: $l_m$] ;
    endscope

    % the set P
    node [myblue,fit=(f1) (f4),label=above:$Products$] ;
    % the set L
    node [mygreen,fit=(s1) (s4),label=above:$Locations$] ;
    % the edges
    draw[ultra thin,dashed,-] (f2) -- (f3);
    draw[ultra thin,dashed,-] (f3) -- (f4);
    draw[ultra thin,dashed,-] (s2) -- (s3);
    draw[ultra thin,dashed,-] (s3) -- (s4);
    draw[-,dotted] (f1) -- (s1);
    draw[-,dotted] (f1) -- (s2);
    draw[-,dotted] (f1) -- (s3);
    draw[-,dotted] (f1) -- (s4);
    draw[-,dotted] (f2) -- (s1);
    draw[-,dotted] (f2) -- (s2);
    draw[-,dotted] (f2) -- (s3);
    draw[-,dotted] (f2) -- (s4);
    draw[-,dotted] (f3) -- (s1);
    draw[-,dotted] (f3) -- (s2);
    draw[-,dotted] (f3) -- (s3);
    draw[-,dotted] (f3) -- (s4);
    draw[-,dotted] (f4) -- (s1);
    draw[-,dotted] (f4) -- (s2);
    draw[-,dotted] (f4) -- (s3);
    draw[-,dotted] (f4) -- (s4);
    endtikzpicture
    endfigure


    This induces the image:
    enter image description here



    But what I would like is the following image:
    enter image description here



    What code do I have to add to make use of accolades or something simular?






    tikz-pgf graphs







    share|improve this question























      up vote
      7
      down vote

      favorite









      up vote
      7
      down vote

      favorite











      I want to include accolades in my bipartite graph to show that nodes belong to a certain group. With the code below I created the following bipartite graph:



      beginfigure[H]
      centering
      definecolormyblueRGB80,80,160
      definecolormygreenRGB80,160,80
      begintikzpicture[thick,
       every node/.style=draw,circle,
       fsnode/.style=fill=myblue,
       ssnode/.style=fill=mygreen,
       every fit/.style=ellipse,draw,inner sep=-2pt,text width=2cm,
       ->,shorten >= 3pt,shorten <= 3pt
      ]
      % the vertices of P
      beginscope[start chain=going below,node distance=10mm]
       node[fsnode,on chain] (f1) [label=left: $p_1$] ;
       node[fsnode,on chain] (f2) [label=left: $p_2$] ;
       node[fsnode,on chain] (f3) [label=left: ] ;
       node[fsnode,on chain] (f4) [label=left: $p_n$] ;
      endscope

      % the vertices of L
      beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
       node[ssnode,on chain] (s1) [label=right: $l_1$] ;
       node[ssnode,on chain] (s2) [label=right: $l_2$] ;
       node[ssnode,on chain] (s3) [label=right: ] ;
       node[ssnode,on chain] (s4) [label=right: $l_m$] ;
      endscope

      % the set P
      node [myblue,fit=(f1) (f4),label=above:$Products$] ;
      % the set L
      node [mygreen,fit=(s1) (s4),label=above:$Locations$] ;
      % the edges
      draw[ultra thin,dashed,-] (f2) -- (f3);
      draw[ultra thin,dashed,-] (f3) -- (f4);
      draw[ultra thin,dashed,-] (s2) -- (s3);
      draw[ultra thin,dashed,-] (s3) -- (s4);
      draw[-,dotted] (f1) -- (s1);
      draw[-,dotted] (f1) -- (s2);
      draw[-,dotted] (f1) -- (s3);
      draw[-,dotted] (f1) -- (s4);
      draw[-,dotted] (f2) -- (s1);
      draw[-,dotted] (f2) -- (s2);
      draw[-,dotted] (f2) -- (s3);
      draw[-,dotted] (f2) -- (s4);
      draw[-,dotted] (f3) -- (s1);
      draw[-,dotted] (f3) -- (s2);
      draw[-,dotted] (f3) -- (s3);
      draw[-,dotted] (f3) -- (s4);
      draw[-,dotted] (f4) -- (s1);
      draw[-,dotted] (f4) -- (s2);
      draw[-,dotted] (f4) -- (s3);
      draw[-,dotted] (f4) -- (s4);
      endtikzpicture
      endfigure


      This induces the image:
      enter image description here



      But what I would like is the following image:
      enter image description here



      What code do I have to add to make use of accolades or something simular?






      tikz-pgf graphs







      share|improve this question













      I want to include accolades in my bipartite graph to show that nodes belong to a certain group. With the code below I created the following bipartite graph:



      beginfigure[H]
      centering
      definecolormyblueRGB80,80,160
      definecolormygreenRGB80,160,80
      begintikzpicture[thick,
       every node/.style=draw,circle,
       fsnode/.style=fill=myblue,
       ssnode/.style=fill=mygreen,
       every fit/.style=ellipse,draw,inner sep=-2pt,text width=2cm,
       ->,shorten >= 3pt,shorten <= 3pt
      ]
      % the vertices of P
      beginscope[start chain=going below,node distance=10mm]
       node[fsnode,on chain] (f1) [label=left: $p_1$] ;
       node[fsnode,on chain] (f2) [label=left: $p_2$] ;
       node[fsnode,on chain] (f3) [label=left: ] ;
       node[fsnode,on chain] (f4) [label=left: $p_n$] ;
      endscope

      % the vertices of L
      beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
       node[ssnode,on chain] (s1) [label=right: $l_1$] ;
       node[ssnode,on chain] (s2) [label=right: $l_2$] ;
       node[ssnode,on chain] (s3) [label=right: ] ;
       node[ssnode,on chain] (s4) [label=right: $l_m$] ;
      endscope

      % the set P
      node [myblue,fit=(f1) (f4),label=above:$Products$] ;
      % the set L
      node [mygreen,fit=(s1) (s4),label=above:$Locations$] ;
      % the edges
      draw[ultra thin,dashed,-] (f2) -- (f3);
      draw[ultra thin,dashed,-] (f3) -- (f4);
      draw[ultra thin,dashed,-] (s2) -- (s3);
      draw[ultra thin,dashed,-] (s3) -- (s4);
      draw[-,dotted] (f1) -- (s1);
      draw[-,dotted] (f1) -- (s2);
      draw[-,dotted] (f1) -- (s3);
      draw[-,dotted] (f1) -- (s4);
      draw[-,dotted] (f2) -- (s1);
      draw[-,dotted] (f2) -- (s2);
      draw[-,dotted] (f2) -- (s3);
      draw[-,dotted] (f2) -- (s4);
      draw[-,dotted] (f3) -- (s1);
      draw[-,dotted] (f3) -- (s2);
      draw[-,dotted] (f3) -- (s3);
      draw[-,dotted] (f3) -- (s4);
      draw[-,dotted] (f4) -- (s1);
      draw[-,dotted] (f4) -- (s2);
      draw[-,dotted] (f4) -- (s3);
      draw[-,dotted] (f4) -- (s4);
      endtikzpicture
      endfigure


      This induces the image:
      enter image description here



      But what I would like is the following image:
      enter image description here



      What code do I have to add to make use of accolades or something simular?






      tikz-pgf graphs




      tikz-pgf graphs






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Aug 15 at 9:09









      Jorden

      413




      413




















          1 Answer
          1






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          oldest

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          up vote
          10
          down vote



          accepted










          You can use the brace decoration from the decorations.pathreplacing library for that. I used a lot of shifts to make it a bit better looking, but you can choose to omit those. By using the method as explained by @marmot, all the shifts can be omitted.



          This is the code for the braces:



           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node(C1)$ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node(C2)$ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node(Cg)$ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node(LC1)$ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node(LC2)$ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node(LCg)$ L^C_gamma $;
           endscope
           endscope


          enter image description here



          I also used some foreach loops to ease the drawing of all those similar lines, and to place the circular nodes that don't have a label.



          Also I noticed that you set -> for the entire tikzpicture, and then continue to set the - key for all draw commands, which feels a bit counterproductive so I removed that. Additionally I changed the every node/.style to a base node/.style and used the inheritance of styles to make sure that both the fsnode style and the ssnode style inherit its properties. Finally I changed the font of the two top labels (Products and Locations) to itshape, instead of typesetting those words in mathmode, because it simply looks better.



          MWE:



          documentclass[tikz,margin=2mm]standalone

          usetikzlibrarychains,fit,shapes,decorations.pathreplacing

          begindocument
          % beginfigure[H]
           centering
           definecolormyblueRGB80,80,160
           definecolormygreenRGB80,160,80
           begintikzpicture[thick,
           base node/.style=draw,circle,
           fsnode/.style=base node,fill=myblue,
           ssnode/.style=base node,fill=mygreen,
           set/.style=ellipse,draw,inner xsep = 20pt,inner ysep=-20pt,
           subset/.style=inner sep=3pt,
           shorten >= 3pt,shorten <= 3pt
           ]
           % the vertices of P
           beginscope[start chain=going below,node distance=10mm]
           node[fsnode,on chain] (f1) [label=left: $p_1$] ;
           node[fsnode,on chain] (f2) [label=left: $p_2$] ;
           foreach i in 3,...,7
           node[fsnode,on chain] (fi) ;
           
           node[fsnode,on chain] (f8) [label=left: $p_n$] ;
           endscope

           % the vertices of L
           beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
           node[ssnode,on chain] (s1) [label=right: $l_1$] ;
           node[ssnode,on chain] (s2) [label=right: $l_2$] ;
           foreach i in 3,...,7
           node[ssnode,on chain] (si) ;
           
           node[ssnode,on chain] (s8) [label=right: $l_m$] ;
           endscope

           % the set P
           node [set,myblue,fit=(f1) (f8),label=[font=itshape]above:Products] (set1) ;
           % the set L
           node [set,mygreen,fit=(s1) (s8),label=[font=itshape]above:Locations] (set2) ;
           % the edges
           foreach i [count=j from 1] in 2,...,8
           draw[thin,dashed] (fj) -- (fi);
           draw[thin,dashed] (sj) -- (si);
           
           foreach i in 1,...,8
           foreach j in 1,...,8
           draw[dotted] (fi) -- (sj);
           
           

           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node (C1) $ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node (C2) $ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node (Cg) $ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node (LC1) $ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node (LC2) $ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node (LCg) $ L^C_gamma $;
           endscope
           endscope

           draw[thin,dashed] (C2) -- (Cg);
           draw[thin,dashed] (LC2) -- (LCg);
           endtikzpicture
          % endfigure
          enddocument


          PS: I really like the chains! Perfect for this application.



          Edit (@Sebastiano)

          One might argue that having the labels of the sets in upright shape is aesthetically more acceptable. I will leave the choice for you.



          enter image description here



          documentclass[tikz,margin=2mm]standalone

          usetikzlibrarychains,fit,shapes,decorations.pathreplacing

          begindocument
          % beginfigure[H]
           centering
           definecolormyblueRGB80,80,160
           definecolormygreenRGB80,160,80
           begintikzpicture[thick,
           base node/.style=draw,circle,
           fsnode/.style=base node,fill=myblue,
           ssnode/.style=base node,fill=mygreen,
           set/.style=ellipse,draw,inner xsep = 20pt,inner ysep=-20pt,
           subset/.style=inner sep=3pt,
           shorten >= 3pt,shorten <= 3pt
           ]
           % the vertices of P
           beginscope[start chain=going below,node distance=10mm]
           node[fsnode,on chain] (f1) [label=left: $p_1$] ;
           node[fsnode,on chain] (f2) [label=left: $p_2$] ;
           foreach i in 3,...,7
           node[fsnode,on chain] (fi) ;
           
           node[fsnode,on chain] (f8) [label=left: $p_n$] ;
           endscope

           % the vertices of L
           beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
           node[ssnode,on chain] (s1) [label=right: $l_1$] ;
           node[ssnode,on chain] (s2) [label=right: $l_2$] ;
           foreach i in 3,...,7
           node[ssnode,on chain] (si) ;
           
           node[ssnode,on chain] (s8) [label=right: $l_m$] ;
           endscope

           % the set P
           node [set,myblue,fit=(f1) (f8),label=above:Products] (set1) ;
           % the set L
           node [set,mygreen,fit=(s1) (s8),label=above:Locations] (set2) ;
           % the edges
           foreach i [count=j from 1] in 2,...,8
           draw[thin,dashed] (fj) -- (fi);
           draw[thin,dashed] (sj) -- (si);
           
           foreach i in 1,...,8
           foreach j in 1,...,8
           draw[dotted] (fi) -- (sj);
           
           

           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node (C1) $ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node (C2) $ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node (Cg) $ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node (LC1) $ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node (LC2) $ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node (LCg) $ L^C_gamma $;
           endscope
           endscope

           draw[thin,dashed] (C2) -- (Cg);
           draw[thin,dashed] (LC2) -- (LCg);
           endtikzpicture
          % endfigure
          enddocument





          share|improve this answer






















          • Wonderful! Upvoted. Can I ask a favour, please? Can you edit your answer, putting the text in roman and not italic? It is better, for my opinion.
            – Sebastiano
            Aug 15 at 9:54










          • @Sebastiano Do you mean the top labels in (normal) upright shape?
            – Max
            Aug 15 at 9:56










          • Products and Locations, Max, normal shape exact.
            – Sebastiano
            Aug 15 at 9:57










          • But you are not that you had to let everyone know :-):-). Aesthetically now it is more beautiful :-).
            – Sebastiano
            Aug 15 at 10:05







          • 1




            +1, very nice! You could actually use fit also to determine the size of the braces. That is, you could fit the nodes that you want to embrace and also one coordinate on the border fit=(f1) (f3) (f1 -| Fit1), where Fit1 is the blue fit node, and then draw the brace from the fit box south west to north west, say.
            – marmot
            Aug 15 at 13:44










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          1 Answer
          1






          active

          oldest

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          active

          oldest

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          active

          oldest

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          up vote
          10
          down vote



          accepted










          You can use the brace decoration from the decorations.pathreplacing library for that. I used a lot of shifts to make it a bit better looking, but you can choose to omit those. By using the method as explained by @marmot, all the shifts can be omitted.



          This is the code for the braces:



           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node(C1)$ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node(C2)$ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node(Cg)$ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node(LC1)$ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node(LC2)$ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node(LCg)$ L^C_gamma $;
           endscope
           endscope


          enter image description here



          I also used some foreach loops to ease the drawing of all those similar lines, and to place the circular nodes that don't have a label.



          Also I noticed that you set -> for the entire tikzpicture, and then continue to set the - key for all draw commands, which feels a bit counterproductive so I removed that. Additionally I changed the every node/.style to a base node/.style and used the inheritance of styles to make sure that both the fsnode style and the ssnode style inherit its properties. Finally I changed the font of the two top labels (Products and Locations) to itshape, instead of typesetting those words in mathmode, because it simply looks better.



          MWE:



          documentclass[tikz,margin=2mm]standalone

          usetikzlibrarychains,fit,shapes,decorations.pathreplacing

          begindocument
          % beginfigure[H]
           centering
           definecolormyblueRGB80,80,160
           definecolormygreenRGB80,160,80
           begintikzpicture[thick,
           base node/.style=draw,circle,
           fsnode/.style=base node,fill=myblue,
           ssnode/.style=base node,fill=mygreen,
           set/.style=ellipse,draw,inner xsep = 20pt,inner ysep=-20pt,
           subset/.style=inner sep=3pt,
           shorten >= 3pt,shorten <= 3pt
           ]
           % the vertices of P
           beginscope[start chain=going below,node distance=10mm]
           node[fsnode,on chain] (f1) [label=left: $p_1$] ;
           node[fsnode,on chain] (f2) [label=left: $p_2$] ;
           foreach i in 3,...,7
           node[fsnode,on chain] (fi) ;
           
           node[fsnode,on chain] (f8) [label=left: $p_n$] ;
           endscope

           % the vertices of L
           beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
           node[ssnode,on chain] (s1) [label=right: $l_1$] ;
           node[ssnode,on chain] (s2) [label=right: $l_2$] ;
           foreach i in 3,...,7
           node[ssnode,on chain] (si) ;
           
           node[ssnode,on chain] (s8) [label=right: $l_m$] ;
           endscope

           % the set P
           node [set,myblue,fit=(f1) (f8),label=[font=itshape]above:Products] (set1) ;
           % the set L
           node [set,mygreen,fit=(s1) (s8),label=[font=itshape]above:Locations] (set2) ;
           % the edges
           foreach i [count=j from 1] in 2,...,8
           draw[thin,dashed] (fj) -- (fi);
           draw[thin,dashed] (sj) -- (si);
           
           foreach i in 1,...,8
           foreach j in 1,...,8
           draw[dotted] (fi) -- (sj);
           
           

           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node (C1) $ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node (C2) $ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node (Cg) $ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node (LC1) $ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node (LC2) $ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node (LCg) $ L^C_gamma $;
           endscope
           endscope

           draw[thin,dashed] (C2) -- (Cg);
           draw[thin,dashed] (LC2) -- (LCg);
           endtikzpicture
          % endfigure
          enddocument


          PS: I really like the chains! Perfect for this application.



          Edit (@Sebastiano)

          One might argue that having the labels of the sets in upright shape is aesthetically more acceptable. I will leave the choice for you.



          enter image description here



          documentclass[tikz,margin=2mm]standalone

          usetikzlibrarychains,fit,shapes,decorations.pathreplacing

          begindocument
          % beginfigure[H]
           centering
           definecolormyblueRGB80,80,160
           definecolormygreenRGB80,160,80
           begintikzpicture[thick,
           base node/.style=draw,circle,
           fsnode/.style=base node,fill=myblue,
           ssnode/.style=base node,fill=mygreen,
           set/.style=ellipse,draw,inner xsep = 20pt,inner ysep=-20pt,
           subset/.style=inner sep=3pt,
           shorten >= 3pt,shorten <= 3pt
           ]
           % the vertices of P
           beginscope[start chain=going below,node distance=10mm]
           node[fsnode,on chain] (f1) [label=left: $p_1$] ;
           node[fsnode,on chain] (f2) [label=left: $p_2$] ;
           foreach i in 3,...,7
           node[fsnode,on chain] (fi) ;
           
           node[fsnode,on chain] (f8) [label=left: $p_n$] ;
           endscope

           % the vertices of L
           beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
           node[ssnode,on chain] (s1) [label=right: $l_1$] ;
           node[ssnode,on chain] (s2) [label=right: $l_2$] ;
           foreach i in 3,...,7
           node[ssnode,on chain] (si) ;
           
           node[ssnode,on chain] (s8) [label=right: $l_m$] ;
           endscope

           % the set P
           node [set,myblue,fit=(f1) (f8),label=above:Products] (set1) ;
           % the set L
           node [set,mygreen,fit=(s1) (s8),label=above:Locations] (set2) ;
           % the edges
           foreach i [count=j from 1] in 2,...,8
           draw[thin,dashed] (fj) -- (fi);
           draw[thin,dashed] (sj) -- (si);
           
           foreach i in 1,...,8
           foreach j in 1,...,8
           draw[dotted] (fi) -- (sj);
           
           

           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node (C1) $ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node (C2) $ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node (Cg) $ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node (LC1) $ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node (LC2) $ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node (LCg) $ L^C_gamma $;
           endscope
           endscope

           draw[thin,dashed] (C2) -- (Cg);
           draw[thin,dashed] (LC2) -- (LCg);
           endtikzpicture
          % endfigure
          enddocument





          share|improve this answer






















          • Wonderful! Upvoted. Can I ask a favour, please? Can you edit your answer, putting the text in roman and not italic? It is better, for my opinion.
            – Sebastiano
            Aug 15 at 9:54










          • @Sebastiano Do you mean the top labels in (normal) upright shape?
            – Max
            Aug 15 at 9:56










          • Products and Locations, Max, normal shape exact.
            – Sebastiano
            Aug 15 at 9:57










          • But you are not that you had to let everyone know :-):-). Aesthetically now it is more beautiful :-).
            – Sebastiano
            Aug 15 at 10:05







          • 1




            +1, very nice! You could actually use fit also to determine the size of the braces. That is, you could fit the nodes that you want to embrace and also one coordinate on the border fit=(f1) (f3) (f1 -| Fit1), where Fit1 is the blue fit node, and then draw the brace from the fit box south west to north west, say.
            – marmot
            Aug 15 at 13:44














          up vote
          10
          down vote



          accepted










          You can use the brace decoration from the decorations.pathreplacing library for that. I used a lot of shifts to make it a bit better looking, but you can choose to omit those. By using the method as explained by @marmot, all the shifts can be omitted.



          This is the code for the braces:



           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node(C1)$ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node(C2)$ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node(Cg)$ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node(LC1)$ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node(LC2)$ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node(LCg)$ L^C_gamma $;
           endscope
           endscope


          enter image description here



          I also used some foreach loops to ease the drawing of all those similar lines, and to place the circular nodes that don't have a label.



          Also I noticed that you set -> for the entire tikzpicture, and then continue to set the - key for all draw commands, which feels a bit counterproductive so I removed that. Additionally I changed the every node/.style to a base node/.style and used the inheritance of styles to make sure that both the fsnode style and the ssnode style inherit its properties. Finally I changed the font of the two top labels (Products and Locations) to itshape, instead of typesetting those words in mathmode, because it simply looks better.



          MWE:



          documentclass[tikz,margin=2mm]standalone

          usetikzlibrarychains,fit,shapes,decorations.pathreplacing

          begindocument
          % beginfigure[H]
           centering
           definecolormyblueRGB80,80,160
           definecolormygreenRGB80,160,80
           begintikzpicture[thick,
           base node/.style=draw,circle,
           fsnode/.style=base node,fill=myblue,
           ssnode/.style=base node,fill=mygreen,
           set/.style=ellipse,draw,inner xsep = 20pt,inner ysep=-20pt,
           subset/.style=inner sep=3pt,
           shorten >= 3pt,shorten <= 3pt
           ]
           % the vertices of P
           beginscope[start chain=going below,node distance=10mm]
           node[fsnode,on chain] (f1) [label=left: $p_1$] ;
           node[fsnode,on chain] (f2) [label=left: $p_2$] ;
           foreach i in 3,...,7
           node[fsnode,on chain] (fi) ;
           
           node[fsnode,on chain] (f8) [label=left: $p_n$] ;
           endscope

           % the vertices of L
           beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
           node[ssnode,on chain] (s1) [label=right: $l_1$] ;
           node[ssnode,on chain] (s2) [label=right: $l_2$] ;
           foreach i in 3,...,7
           node[ssnode,on chain] (si) ;
           
           node[ssnode,on chain] (s8) [label=right: $l_m$] ;
           endscope

           % the set P
           node [set,myblue,fit=(f1) (f8),label=[font=itshape]above:Products] (set1) ;
           % the set L
           node [set,mygreen,fit=(s1) (s8),label=[font=itshape]above:Locations] (set2) ;
           % the edges
           foreach i [count=j from 1] in 2,...,8
           draw[thin,dashed] (fj) -- (fi);
           draw[thin,dashed] (sj) -- (si);
           
           foreach i in 1,...,8
           foreach j in 1,...,8
           draw[dotted] (fi) -- (sj);
           
           

           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node (C1) $ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node (C2) $ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node (Cg) $ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node (LC1) $ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node (LC2) $ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node (LCg) $ L^C_gamma $;
           endscope
           endscope

           draw[thin,dashed] (C2) -- (Cg);
           draw[thin,dashed] (LC2) -- (LCg);
           endtikzpicture
          % endfigure
          enddocument


          PS: I really like the chains! Perfect for this application.



          Edit (@Sebastiano)

          One might argue that having the labels of the sets in upright shape is aesthetically more acceptable. I will leave the choice for you.



          enter image description here



          documentclass[tikz,margin=2mm]standalone

          usetikzlibrarychains,fit,shapes,decorations.pathreplacing

          begindocument
          % beginfigure[H]
           centering
           definecolormyblueRGB80,80,160
           definecolormygreenRGB80,160,80
           begintikzpicture[thick,
           base node/.style=draw,circle,
           fsnode/.style=base node,fill=myblue,
           ssnode/.style=base node,fill=mygreen,
           set/.style=ellipse,draw,inner xsep = 20pt,inner ysep=-20pt,
           subset/.style=inner sep=3pt,
           shorten >= 3pt,shorten <= 3pt
           ]
           % the vertices of P
           beginscope[start chain=going below,node distance=10mm]
           node[fsnode,on chain] (f1) [label=left: $p_1$] ;
           node[fsnode,on chain] (f2) [label=left: $p_2$] ;
           foreach i in 3,...,7
           node[fsnode,on chain] (fi) ;
           
           node[fsnode,on chain] (f8) [label=left: $p_n$] ;
           endscope

           % the vertices of L
           beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
           node[ssnode,on chain] (s1) [label=right: $l_1$] ;
           node[ssnode,on chain] (s2) [label=right: $l_2$] ;
           foreach i in 3,...,7
           node[ssnode,on chain] (si) ;
           
           node[ssnode,on chain] (s8) [label=right: $l_m$] ;
           endscope

           % the set P
           node [set,myblue,fit=(f1) (f8),label=above:Products] (set1) ;
           % the set L
           node [set,mygreen,fit=(s1) (s8),label=above:Locations] (set2) ;
           % the edges
           foreach i [count=j from 1] in 2,...,8
           draw[thin,dashed] (fj) -- (fi);
           draw[thin,dashed] (sj) -- (si);
           
           foreach i in 1,...,8
           foreach j in 1,...,8
           draw[dotted] (fi) -- (sj);
           
           

           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node (C1) $ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node (C2) $ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node (Cg) $ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node (LC1) $ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node (LC2) $ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node (LCg) $ L^C_gamma $;
           endscope
           endscope

           draw[thin,dashed] (C2) -- (Cg);
           draw[thin,dashed] (LC2) -- (LCg);
           endtikzpicture
          % endfigure
          enddocument





          share|improve this answer






















          • Wonderful! Upvoted. Can I ask a favour, please? Can you edit your answer, putting the text in roman and not italic? It is better, for my opinion.
            – Sebastiano
            Aug 15 at 9:54










          • @Sebastiano Do you mean the top labels in (normal) upright shape?
            – Max
            Aug 15 at 9:56










          • Products and Locations, Max, normal shape exact.
            – Sebastiano
            Aug 15 at 9:57










          • But you are not that you had to let everyone know :-):-). Aesthetically now it is more beautiful :-).
            – Sebastiano
            Aug 15 at 10:05







          • 1




            +1, very nice! You could actually use fit also to determine the size of the braces. That is, you could fit the nodes that you want to embrace and also one coordinate on the border fit=(f1) (f3) (f1 -| Fit1), where Fit1 is the blue fit node, and then draw the brace from the fit box south west to north west, say.
            – marmot
            Aug 15 at 13:44












          up vote
          10
          down vote



          accepted







          up vote
          10
          down vote



          accepted






          You can use the brace decoration from the decorations.pathreplacing library for that. I used a lot of shifts to make it a bit better looking, but you can choose to omit those. By using the method as explained by @marmot, all the shifts can be omitted.



          This is the code for the braces:



           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node(C1)$ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node(C2)$ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node(Cg)$ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node(LC1)$ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node(LC2)$ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node(LCg)$ L^C_gamma $;
           endscope
           endscope


          enter image description here



          I also used some foreach loops to ease the drawing of all those similar lines, and to place the circular nodes that don't have a label.



          Also I noticed that you set -> for the entire tikzpicture, and then continue to set the - key for all draw commands, which feels a bit counterproductive so I removed that. Additionally I changed the every node/.style to a base node/.style and used the inheritance of styles to make sure that both the fsnode style and the ssnode style inherit its properties. Finally I changed the font of the two top labels (Products and Locations) to itshape, instead of typesetting those words in mathmode, because it simply looks better.



          MWE:



          documentclass[tikz,margin=2mm]standalone

          usetikzlibrarychains,fit,shapes,decorations.pathreplacing

          begindocument
          % beginfigure[H]
           centering
           definecolormyblueRGB80,80,160
           definecolormygreenRGB80,160,80
           begintikzpicture[thick,
           base node/.style=draw,circle,
           fsnode/.style=base node,fill=myblue,
           ssnode/.style=base node,fill=mygreen,
           set/.style=ellipse,draw,inner xsep = 20pt,inner ysep=-20pt,
           subset/.style=inner sep=3pt,
           shorten >= 3pt,shorten <= 3pt
           ]
           % the vertices of P
           beginscope[start chain=going below,node distance=10mm]
           node[fsnode,on chain] (f1) [label=left: $p_1$] ;
           node[fsnode,on chain] (f2) [label=left: $p_2$] ;
           foreach i in 3,...,7
           node[fsnode,on chain] (fi) ;
           
           node[fsnode,on chain] (f8) [label=left: $p_n$] ;
           endscope

           % the vertices of L
           beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
           node[ssnode,on chain] (s1) [label=right: $l_1$] ;
           node[ssnode,on chain] (s2) [label=right: $l_2$] ;
           foreach i in 3,...,7
           node[ssnode,on chain] (si) ;
           
           node[ssnode,on chain] (s8) [label=right: $l_m$] ;
           endscope

           % the set P
           node [set,myblue,fit=(f1) (f8),label=[font=itshape]above:Products] (set1) ;
           % the set L
           node [set,mygreen,fit=(s1) (s8),label=[font=itshape]above:Locations] (set2) ;
           % the edges
           foreach i [count=j from 1] in 2,...,8
           draw[thin,dashed] (fj) -- (fi);
           draw[thin,dashed] (sj) -- (si);
           
           foreach i in 1,...,8
           foreach j in 1,...,8
           draw[dotted] (fi) -- (sj);
           
           

           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node (C1) $ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node (C2) $ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node (Cg) $ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node (LC1) $ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node (LC2) $ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node (LCg) $ L^C_gamma $;
           endscope
           endscope

           draw[thin,dashed] (C2) -- (Cg);
           draw[thin,dashed] (LC2) -- (LCg);
           endtikzpicture
          % endfigure
          enddocument


          PS: I really like the chains! Perfect for this application.



          Edit (@Sebastiano)

          One might argue that having the labels of the sets in upright shape is aesthetically more acceptable. I will leave the choice for you.



          enter image description here



          documentclass[tikz,margin=2mm]standalone

          usetikzlibrarychains,fit,shapes,decorations.pathreplacing

          begindocument
          % beginfigure[H]
           centering
           definecolormyblueRGB80,80,160
           definecolormygreenRGB80,160,80
           begintikzpicture[thick,
           base node/.style=draw,circle,
           fsnode/.style=base node,fill=myblue,
           ssnode/.style=base node,fill=mygreen,
           set/.style=ellipse,draw,inner xsep = 20pt,inner ysep=-20pt,
           subset/.style=inner sep=3pt,
           shorten >= 3pt,shorten <= 3pt
           ]
           % the vertices of P
           beginscope[start chain=going below,node distance=10mm]
           node[fsnode,on chain] (f1) [label=left: $p_1$] ;
           node[fsnode,on chain] (f2) [label=left: $p_2$] ;
           foreach i in 3,...,7
           node[fsnode,on chain] (fi) ;
           
           node[fsnode,on chain] (f8) [label=left: $p_n$] ;
           endscope

           % the vertices of L
           beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
           node[ssnode,on chain] (s1) [label=right: $l_1$] ;
           node[ssnode,on chain] (s2) [label=right: $l_2$] ;
           foreach i in 3,...,7
           node[ssnode,on chain] (si) ;
           
           node[ssnode,on chain] (s8) [label=right: $l_m$] ;
           endscope

           % the set P
           node [set,myblue,fit=(f1) (f8),label=above:Products] (set1) ;
           % the set L
           node [set,mygreen,fit=(s1) (s8),label=above:Locations] (set2) ;
           % the edges
           foreach i [count=j from 1] in 2,...,8
           draw[thin,dashed] (fj) -- (fi);
           draw[thin,dashed] (sj) -- (si);
           
           foreach i in 1,...,8
           foreach j in 1,...,8
           draw[dotted] (fi) -- (sj);
           
           

           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node (C1) $ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node (C2) $ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node (Cg) $ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node (LC1) $ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node (LC2) $ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node (LCg) $ L^C_gamma $;
           endscope
           endscope

           draw[thin,dashed] (C2) -- (Cg);
           draw[thin,dashed] (LC2) -- (LCg);
           endtikzpicture
          % endfigure
          enddocument





          share|improve this answer














          You can use the brace decoration from the decorations.pathreplacing library for that. I used a lot of shifts to make it a bit better looking, but you can choose to omit those. By using the method as explained by @marmot, all the shifts can be omitted.



          This is the code for the braces:



           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node(C1)$ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node(C2)$ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node(Cg)$ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node(LC1)$ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node(LC2)$ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node(LCg)$ L^C_gamma $;
           endscope
           endscope


          enter image description here



          I also used some foreach loops to ease the drawing of all those similar lines, and to place the circular nodes that don't have a label.



          Also I noticed that you set -> for the entire tikzpicture, and then continue to set the - key for all draw commands, which feels a bit counterproductive so I removed that. Additionally I changed the every node/.style to a base node/.style and used the inheritance of styles to make sure that both the fsnode style and the ssnode style inherit its properties. Finally I changed the font of the two top labels (Products and Locations) to itshape, instead of typesetting those words in mathmode, because it simply looks better.



          MWE:



          documentclass[tikz,margin=2mm]standalone

          usetikzlibrarychains,fit,shapes,decorations.pathreplacing

          begindocument
          % beginfigure[H]
           centering
           definecolormyblueRGB80,80,160
           definecolormygreenRGB80,160,80
           begintikzpicture[thick,
           base node/.style=draw,circle,
           fsnode/.style=base node,fill=myblue,
           ssnode/.style=base node,fill=mygreen,
           set/.style=ellipse,draw,inner xsep = 20pt,inner ysep=-20pt,
           subset/.style=inner sep=3pt,
           shorten >= 3pt,shorten <= 3pt
           ]
           % the vertices of P
           beginscope[start chain=going below,node distance=10mm]
           node[fsnode,on chain] (f1) [label=left: $p_1$] ;
           node[fsnode,on chain] (f2) [label=left: $p_2$] ;
           foreach i in 3,...,7
           node[fsnode,on chain] (fi) ;
           
           node[fsnode,on chain] (f8) [label=left: $p_n$] ;
           endscope

           % the vertices of L
           beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
           node[ssnode,on chain] (s1) [label=right: $l_1$] ;
           node[ssnode,on chain] (s2) [label=right: $l_2$] ;
           foreach i in 3,...,7
           node[ssnode,on chain] (si) ;
           
           node[ssnode,on chain] (s8) [label=right: $l_m$] ;
           endscope

           % the set P
           node [set,myblue,fit=(f1) (f8),label=[font=itshape]above:Products] (set1) ;
           % the set L
           node [set,mygreen,fit=(s1) (s8),label=[font=itshape]above:Locations] (set2) ;
           % the edges
           foreach i [count=j from 1] in 2,...,8
           draw[thin,dashed] (fj) -- (fi);
           draw[thin,dashed] (sj) -- (si);
           
           foreach i in 1,...,8
           foreach j in 1,...,8
           draw[dotted] (fi) -- (sj);
           
           

           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node (C1) $ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node (C2) $ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node (Cg) $ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node (LC1) $ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node (LC2) $ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node (LCg) $ L^C_gamma $;
           endscope
           endscope

           draw[thin,dashed] (C2) -- (Cg);
           draw[thin,dashed] (LC2) -- (LCg);
           endtikzpicture
          % endfigure
          enddocument


          PS: I really like the chains! Perfect for this application.



          Edit (@Sebastiano)

          One might argue that having the labels of the sets in upright shape is aesthetically more acceptable. I will leave the choice for you.



          enter image description here



          documentclass[tikz,margin=2mm]standalone

          usetikzlibrarychains,fit,shapes,decorations.pathreplacing

          begindocument
          % beginfigure[H]
           centering
           definecolormyblueRGB80,80,160
           definecolormygreenRGB80,160,80
           begintikzpicture[thick,
           base node/.style=draw,circle,
           fsnode/.style=base node,fill=myblue,
           ssnode/.style=base node,fill=mygreen,
           set/.style=ellipse,draw,inner xsep = 20pt,inner ysep=-20pt,
           subset/.style=inner sep=3pt,
           shorten >= 3pt,shorten <= 3pt
           ]
           % the vertices of P
           beginscope[start chain=going below,node distance=10mm]
           node[fsnode,on chain] (f1) [label=left: $p_1$] ;
           node[fsnode,on chain] (f2) [label=left: $p_2$] ;
           foreach i in 3,...,7
           node[fsnode,on chain] (fi) ;
           
           node[fsnode,on chain] (f8) [label=left: $p_n$] ;
           endscope

           % the vertices of L
           beginscope[xshift=6cm,yshift=0cm,start chain=going below,node distance=10mm]
           node[ssnode,on chain] (s1) [label=right: $l_1$] ;
           node[ssnode,on chain] (s2) [label=right: $l_2$] ;
           foreach i in 3,...,7
           node[ssnode,on chain] (si) ;
           
           node[ssnode,on chain] (s8) [label=right: $l_m$] ;
           endscope

           % the set P
           node [set,myblue,fit=(f1) (f8),label=above:Products] (set1) ;
           % the set L
           node [set,mygreen,fit=(s1) (s8),label=above:Locations] (set2) ;
           % the edges
           foreach i [count=j from 1] in 2,...,8
           draw[thin,dashed] (fj) -- (fi);
           draw[thin,dashed] (sj) -- (si);
           
           foreach i in 1,...,8
           foreach j in 1,...,8
           draw[dotted] (fi) -- (sj);
           
           

           node[fit=(f1)(f3)(f3-,subset] (c1-fit) ;
           node[fit=(f4)(f5)(f5-,subset] (c2-fit) ;
           node[fit=(f7)(f8)(f8-,subset] (c3-fit) ;
           node[fit=(s1)(s2)(s2-,subset] (lc1-fit) ;
           node[fit=set2.east),subset] (lc2-fit) ;
           node[fit=(s8)(s8)(s8-,subset,inner ysep=10pt] (lc3-fit) ;

           beginscope[decoration=brace,amplitude=3mm]
           beginscope[decoration=mirror,every node/.style=midway,left,xshift=-3mm]
           draw[decorate] (c1-fit.north west) -- (c1-fit.south west) node (C1) $ C_1 $;
           draw[decorate] (c2-fit.north west) -- (c2-fit.south west) node (C2) $ C_2 $;
           draw[decorate] (c3-fit.north west) -- (c3-fit.south west) node (Cg) $ C_gamma $;
           endscope
           beginscope[every node/.style=midway,right,xshift=3mm]
           draw[decorate] (lc1-fit.north east) -- (lc1-fit.south east) node (LC1) $ L^C_1 $;
           draw[decorate] (lc2-fit.north east) -- (lc2-fit.south east) node (LC2) $ L^C_2 $;
           draw[decorate] (lc3-fit.north east) -- (lc3-fit.south east) node (LCg) $ L^C_gamma $;
           endscope
           endscope

           draw[thin,dashed] (C2) -- (Cg);
           draw[thin,dashed] (LC2) -- (LCg);
           endtikzpicture
          % endfigure
          enddocument






          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Aug 15 at 14:10

























          answered Aug 15 at 9:44









          Max

          6,18311728




          6,18311728











          • Wonderful! Upvoted. Can I ask a favour, please? Can you edit your answer, putting the text in roman and not italic? It is better, for my opinion.
            – Sebastiano
            Aug 15 at 9:54










          • @Sebastiano Do you mean the top labels in (normal) upright shape?
            – Max
            Aug 15 at 9:56










          • Products and Locations, Max, normal shape exact.
            – Sebastiano
            Aug 15 at 9:57










          • But you are not that you had to let everyone know :-):-). Aesthetically now it is more beautiful :-).
            – Sebastiano
            Aug 15 at 10:05







          • 1




            +1, very nice! You could actually use fit also to determine the size of the braces. That is, you could fit the nodes that you want to embrace and also one coordinate on the border fit=(f1) (f3) (f1 -| Fit1), where Fit1 is the blue fit node, and then draw the brace from the fit box south west to north west, say.
            – marmot
            Aug 15 at 13:44
















          • Wonderful! Upvoted. Can I ask a favour, please? Can you edit your answer, putting the text in roman and not italic? It is better, for my opinion.
            – Sebastiano
            Aug 15 at 9:54










          • @Sebastiano Do you mean the top labels in (normal) upright shape?
            – Max
            Aug 15 at 9:56










          • Products and Locations, Max, normal shape exact.
            – Sebastiano
            Aug 15 at 9:57










          • But you are not that you had to let everyone know :-):-). Aesthetically now it is more beautiful :-).
            – Sebastiano
            Aug 15 at 10:05







          • 1




            +1, very nice! You could actually use fit also to determine the size of the braces. That is, you could fit the nodes that you want to embrace and also one coordinate on the border fit=(f1) (f3) (f1 -| Fit1), where Fit1 is the blue fit node, and then draw the brace from the fit box south west to north west, say.
            – marmot
            Aug 15 at 13:44















          Wonderful! Upvoted. Can I ask a favour, please? Can you edit your answer, putting the text in roman and not italic? It is better, for my opinion.
          – Sebastiano
          Aug 15 at 9:54




          Wonderful! Upvoted. Can I ask a favour, please? Can you edit your answer, putting the text in roman and not italic? It is better, for my opinion.
          – Sebastiano
          Aug 15 at 9:54












          @Sebastiano Do you mean the top labels in (normal) upright shape?
          – Max
          Aug 15 at 9:56




          @Sebastiano Do you mean the top labels in (normal) upright shape?
          – Max
          Aug 15 at 9:56












          Products and Locations, Max, normal shape exact.
          – Sebastiano
          Aug 15 at 9:57




          Products and Locations, Max, normal shape exact.
          – Sebastiano
          Aug 15 at 9:57












          But you are not that you had to let everyone know :-):-). Aesthetically now it is more beautiful :-).
          – Sebastiano
          Aug 15 at 10:05





          But you are not that you had to let everyone know :-):-). Aesthetically now it is more beautiful :-).
          – Sebastiano
          Aug 15 at 10:05





          1




          1




          +1, very nice! You could actually use fit also to determine the size of the braces. That is, you could fit the nodes that you want to embrace and also one coordinate on the border fit=(f1) (f3) (f1 -| Fit1), where Fit1 is the blue fit node, and then draw the brace from the fit box south west to north west, say.
          – marmot
          Aug 15 at 13:44




          +1, very nice! You could actually use fit also to determine the size of the braces. That is, you could fit the nodes that you want to embrace and also one coordinate on the border fit=(f1) (f3) (f1 -| Fit1), where Fit1 is the blue fit node, and then draw the brace from the fit box south west to north west, say.
          – marmot
          Aug 15 at 13:44

















           

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