braces spanning few rows or columns of a matrix in latex

up vote
4
down vote

favorite

I am trying to put braces on matrix that cover just few rows or columns.

I have come kinda close for the columns but no idea for the rows.

This is the example I have been working on:

documentclassminimal
usepackageamsmath

begindocument

beginequation*
A = beginarrayc@!!!l
left( beginarray[c]ccc
a1 & cdots & aN\
b1 & cdots & bN\
vdots & & vdots\
z1 & cdots & zN \

endarray right)

&
beginarray[c]ll
left. beginarrayc vphantom1cm \ vphantom2*vdots
\ vphantom1cm endarray right} & text$n_1$ times \

endarray
endarray
endequation*

enddocument

which produces this:

enter image description here

Does anyone have any idea?

edited Aug 14 at 16:59

asked Aug 11 at 12:50

Fabio

678

add a commentÂ |Â

up vote
4
down vote

favorite

I am trying to put braces on matrix that cover just few rows or columns.

I have come kinda close for the columns but no idea for the rows.

This is the example I have been working on:

documentclassminimal
usepackageamsmath

begindocument

beginequation*
A = beginarrayc@!!!l
left( beginarray[c]ccc
a1 & cdots & aN\
b1 & cdots & bN\
vdots & & vdots\
z1 & cdots & zN \

endarray right)

&
beginarray[c]ll
left. beginarrayc vphantom1cm \ vphantom2*vdots
\ vphantom1cm endarray right} & text$n_1$ times \

endarray
endarray
endequation*

enddocument

which produces this:

enter image description here

Does anyone have any idea?

edited Aug 14 at 16:59

asked Aug 11 at 12:50

Fabio

678

add a commentÂ |Â

up vote
4
down vote

favorite

I am trying to put braces on matrix that cover just few rows or columns.

I have come kinda close for the columns but no idea for the rows.

This is the example I have been working on:

documentclassminimal
usepackageamsmath

begindocument

beginequation*
A = beginarrayc@!!!l
left( beginarray[c]ccc
a1 & cdots & aN\
b1 & cdots & bN\
vdots & & vdots\
z1 & cdots & zN \

endarray right)

&
beginarray[c]ll
left. beginarrayc vphantom1cm \ vphantom2*vdots
\ vphantom1cm endarray right} & text$n_1$ times \

endarray
endarray
endequation*

enddocument

which produces this:

enter image description here

Does anyone have any idea?

edited Aug 14 at 16:59

asked Aug 11 at 12:50

Fabio

678

I am trying to put braces on matrix that cover just few rows or columns.

I have come kinda close for the columns but no idea for the rows.

This is the example I have been working on:

documentclassminimal
usepackageamsmath

begindocument

beginequation*
A = beginarrayc@!!!l
left( beginarray[c]ccc
a1 & cdots & aN\
b1 & cdots & bN\
vdots & & vdots\
z1 & cdots & zN \

endarray right)

&
beginarray[c]ll
left. beginarrayc vphantom1cm \ vphantom2*vdots
\ vphantom1cm endarray right} & text$n_1$ times \

endarray
endarray
endequation*

enddocument

which produces this:

enter image description here

Does anyone have any idea?

matrices braces

edited Aug 14 at 16:59

asked Aug 11 at 12:50

Fabio

678

edited Aug 14 at 16:59

asked Aug 11 at 12:50

Fabio

678

edited Aug 14 at 16:59

asked Aug 11 at 12:50

Fabio

678

asked Aug 11 at 12:50

Fabio

678

asked Aug 11 at 12:50

Fabio

678

add a commentÂ |Â

4 Answers
4

active

oldest

votes

up vote
4
down vote

accepted

If you want to span only some rows, you can use nicematrix which will put a Tikz node behind each cell of the matrix and then use the commands of Tikz to draw the brace and its label.

documentclassminimal
usepackagenicematrix
NiceMatrixOptionstransparent
usetikzlibrarydecorations.pathreplacing
begindocument
beginequation*
A = beginpmatrix
 [code-after= begintikzpicture
 draw [decorate,decoration = brace]
 ([xshift=3mm]2-4.north east) to node [auto = left] $n_1$ times 
 ([xshift=3mm]4-4.south east) ;
 endtikzpicture
 ]
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpmatrix
endequation*
enddocument

enter image description here

edited Aug 11 at 18:45

answered Aug 11 at 15:58

F. Pantigny

34518

Yes! nicematrix is definitely the way to go. However I couldn't compile your code, could you revisit it?.
â€“Â Fabio
Aug 14 at 16:55

add a commentÂ |Â

up vote
4
down vote

If you want to span all rows of a matrix, you have the rcases environment from mathtools (an extension of amsmath), which also simplifies the code for a matrix, with its pmatrix environment. I added some improvements, as I think the matrix looks nicer with 4 columns:

documentclassminimal
usepackagemathtools

begindocument

beginequation*
beginrcasesdisplaystyle
A = beginpmatrix
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpmatrix
endrcases
 text$n_1$ times
endequation*

enddocument

enter image description here

edited Aug 11 at 19:25

answered Aug 11 at 13:42

Bernard

156k763189

add a commentÂ |Â

up vote
0
down vote

This is the code that worked out for me.

documentclassminimal
usepackagenicematrix
NiceMatrixOptionstransparent
usetikzlibrarydecorations.pathreplacing
begindocument

beginequation*
A=beginpNiceMatrix[name=matrix]
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpNiceMatrix
tikz[remember picture,overlay]
draw[decoration=brace,decorate,thick] ([xshift=3mm]matrix-2-4.north east) -- node[right=6pt] $n_1$ times ([xshift=3mm]matrix-4-4.south east);
endequation*

enddocument

answered Aug 14 at 16:58

Fabio

678

I can compile your code but I can also compile the code of my answer. What is the error messsage you get? If you want, you can send me the log file. My email : fpantigny@wanadoo.fr
â€“Â F. Pantigny
Aug 14 at 18:25

The error is "Package pgf Error: No shape named 2-4 is known". and the same for 4-4. I'll send you the log file.
â€“Â Fabio
Aug 17 at 22:10

add a commentÂ |Â

up vote
0
down vote

You can construct a zero-width array next to your matrix containing elements that match the height of the matrix rows. This way you can place a right} where needed:

enter image description here

documentclassarticle

usepackageamsmath

begindocument

[
 A = beginpmatrix
 a_1 & cdots & a_N \
 b_1 & cdots & b_N \
 vdots & & vdots \
 z_1 & cdots & z_N \
 endpmatrix
 setlengtharraycolsep0pt % Avoid any column space in arrays that follow
 beginarray c 
 vphantoma_N \ % First row
 left.kern-nulldelimiterspace
 vphantombeginarray c 
 b_N \ % Second row
 vdots \ % Third row
 z_N % Fourth/last row
 endarray
 right}text$n_1$ times
 endarray
]

enddocument

answered Aug 14 at 17:09

Werner

421k589141582

add a commentÂ |Â

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4 Answers
4

active

oldest

votes

4 Answers
4

active

oldest

votes

up vote
4
down vote

accepted

If you want to span only some rows, you can use nicematrix which will put a Tikz node behind each cell of the matrix and then use the commands of Tikz to draw the brace and its label.

documentclassminimal
usepackagenicematrix
NiceMatrixOptionstransparent
usetikzlibrarydecorations.pathreplacing
begindocument
beginequation*
A = beginpmatrix
 [code-after= begintikzpicture
 draw [decorate,decoration = brace]
 ([xshift=3mm]2-4.north east) to node [auto = left] $n_1$ times 
 ([xshift=3mm]4-4.south east) ;
 endtikzpicture
 ]
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpmatrix
endequation*
enddocument

enter image description here

edited Aug 11 at 18:45

answered Aug 11 at 15:58

F. Pantigny

34518

Yes! nicematrix is definitely the way to go. However I couldn't compile your code, could you revisit it?.
â€“Â Fabio
Aug 14 at 16:55

add a commentÂ |Â

up vote
4
down vote

accepted

If you want to span only some rows, you can use nicematrix which will put a Tikz node behind each cell of the matrix and then use the commands of Tikz to draw the brace and its label.

documentclassminimal
usepackagenicematrix
NiceMatrixOptionstransparent
usetikzlibrarydecorations.pathreplacing
begindocument
beginequation*
A = beginpmatrix
 [code-after= begintikzpicture
 draw [decorate,decoration = brace]
 ([xshift=3mm]2-4.north east) to node [auto = left] $n_1$ times 
 ([xshift=3mm]4-4.south east) ;
 endtikzpicture
 ]
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpmatrix
endequation*
enddocument

enter image description here

edited Aug 11 at 18:45

answered Aug 11 at 15:58

F. Pantigny

34518

Yes! nicematrix is definitely the way to go. However I couldn't compile your code, could you revisit it?.
â€“Â Fabio
Aug 14 at 16:55

add a commentÂ |Â

up vote
4
down vote

accepted

If you want to span only some rows, you can use nicematrix which will put a Tikz node behind each cell of the matrix and then use the commands of Tikz to draw the brace and its label.

documentclassminimal
usepackagenicematrix
NiceMatrixOptionstransparent
usetikzlibrarydecorations.pathreplacing
begindocument
beginequation*
A = beginpmatrix
 [code-after= begintikzpicture
 draw [decorate,decoration = brace]
 ([xshift=3mm]2-4.north east) to node [auto = left] $n_1$ times 
 ([xshift=3mm]4-4.south east) ;
 endtikzpicture
 ]
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpmatrix
endequation*
enddocument

enter image description here

edited Aug 11 at 18:45

answered Aug 11 at 15:58

F. Pantigny

34518

If you want to span only some rows, you can use nicematrix which will put a Tikz node behind each cell of the matrix and then use the commands of Tikz to draw the brace and its label.

documentclassminimal
usepackagenicematrix
NiceMatrixOptionstransparent
usetikzlibrarydecorations.pathreplacing
begindocument
beginequation*
A = beginpmatrix
 [code-after= begintikzpicture
 draw [decorate,decoration = brace]
 ([xshift=3mm]2-4.north east) to node [auto = left] $n_1$ times 
 ([xshift=3mm]4-4.south east) ;
 endtikzpicture
 ]
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpmatrix
endequation*
enddocument

enter image description here

edited Aug 11 at 18:45

answered Aug 11 at 15:58

F. Pantigny

34518

edited Aug 11 at 18:45

answered Aug 11 at 15:58

F. Pantigny

34518

answered Aug 11 at 15:58

F. Pantigny

34518

answered Aug 11 at 15:58

F. Pantigny

34518

Yes! nicematrix is definitely the way to go. However I couldn't compile your code, could you revisit it?.
â€“Â Fabio
Aug 14 at 16:55

add a commentÂ |Â

Yes! nicematrix is definitely the way to go. However I couldn't compile your code, could you revisit it?.
â€“Â Fabio
Aug 14 at 16:55

Yes! nicematrix is definitely the way to go. However I couldn't compile your code, could you revisit it?.
â€“Â Fabio
Aug 14 at 16:55

add a commentÂ |Â

up vote
4
down vote

documentclassminimal
usepackagemathtools

begindocument

beginequation*
beginrcasesdisplaystyle
A = beginpmatrix
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpmatrix
endrcases
 text$n_1$ times
endequation*

enddocument

enter image description here

edited Aug 11 at 19:25

answered Aug 11 at 13:42

Bernard

156k763189

add a commentÂ |Â

up vote
4
down vote

documentclassminimal
usepackagemathtools

begindocument

beginequation*
beginrcasesdisplaystyle
A = beginpmatrix
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpmatrix
endrcases
 text$n_1$ times
endequation*

enddocument

enter image description here

edited Aug 11 at 19:25

answered Aug 11 at 13:42

Bernard

156k763189

add a commentÂ |Â

up vote
4
down vote

documentclassminimal
usepackagemathtools

begindocument

beginequation*
beginrcasesdisplaystyle
A = beginpmatrix
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpmatrix
endrcases
 text$n_1$ times
endequation*

enddocument

enter image description here

edited Aug 11 at 19:25

answered Aug 11 at 13:42

Bernard

156k763189

documentclassminimal
usepackagemathtools

begindocument

beginequation*
beginrcasesdisplaystyle
A = beginpmatrix
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpmatrix
endrcases
 text$n_1$ times
endequation*

enddocument

enter image description here

edited Aug 11 at 19:25

answered Aug 11 at 13:42

Bernard

156k763189

edited Aug 11 at 19:25

answered Aug 11 at 13:42

Bernard

156k763189

answered Aug 11 at 13:42

Bernard

156k763189

answered Aug 11 at 13:42

Bernard

156k763189

add a commentÂ |Â

up vote
0
down vote

This is the code that worked out for me.

documentclassminimal
usepackagenicematrix
NiceMatrixOptionstransparent
usetikzlibrarydecorations.pathreplacing
begindocument

beginequation*
A=beginpNiceMatrix[name=matrix]
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpNiceMatrix
tikz[remember picture,overlay]
draw[decoration=brace,decorate,thick] ([xshift=3mm]matrix-2-4.north east) -- node[right=6pt] $n_1$ times ([xshift=3mm]matrix-4-4.south east);
endequation*

enddocument

answered Aug 14 at 16:58

Fabio

678

I can compile your code but I can also compile the code of my answer. What is the error messsage you get? If you want, you can send me the log file. My email : fpantigny@wanadoo.fr
â€“Â F. Pantigny
Aug 14 at 18:25

The error is "Package pgf Error: No shape named 2-4 is known". and the same for 4-4. I'll send you the log file.
â€“Â Fabio
Aug 17 at 22:10

add a commentÂ |Â

up vote
0
down vote

This is the code that worked out for me.

documentclassminimal
usepackagenicematrix
NiceMatrixOptionstransparent
usetikzlibrarydecorations.pathreplacing
begindocument

beginequation*
A=beginpNiceMatrix[name=matrix]
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpNiceMatrix
tikz[remember picture,overlay]
draw[decoration=brace,decorate,thick] ([xshift=3mm]matrix-2-4.north east) -- node[right=6pt] $n_1$ times ([xshift=3mm]matrix-4-4.south east);
endequation*

enddocument

answered Aug 14 at 16:58

Fabio

678

I can compile your code but I can also compile the code of my answer. What is the error messsage you get? If you want, you can send me the log file. My email : fpantigny@wanadoo.fr
â€“Â F. Pantigny
Aug 14 at 18:25

The error is "Package pgf Error: No shape named 2-4 is known". and the same for 4-4. I'll send you the log file.
â€“Â Fabio
Aug 17 at 22:10

add a commentÂ |Â

up vote
0
down vote

This is the code that worked out for me.

documentclassminimal
usepackagenicematrix
NiceMatrixOptionstransparent
usetikzlibrarydecorations.pathreplacing
begindocument

beginequation*
A=beginpNiceMatrix[name=matrix]
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpNiceMatrix
tikz[remember picture,overlay]
draw[decoration=brace,decorate,thick] ([xshift=3mm]matrix-2-4.north east) -- node[right=6pt] $n_1$ times ([xshift=3mm]matrix-4-4.south east);
endequation*

enddocument

answered Aug 14 at 16:58

Fabio

678

This is the code that worked out for me.

documentclassminimal
usepackagenicematrix
NiceMatrixOptionstransparent
usetikzlibrarydecorations.pathreplacing
begindocument

beginequation*
A=beginpNiceMatrix[name=matrix]
a1 &hdotsfor2 & aN\
b1 &hdotsfor2 & bN\
vdots & & & vdots\
z1 & cdots &cdots & zN \
endpNiceMatrix
tikz[remember picture,overlay]
draw[decoration=brace,decorate,thick] ([xshift=3mm]matrix-2-4.north east) -- node[right=6pt] $n_1$ times ([xshift=3mm]matrix-4-4.south east);
endequation*

enddocument

answered Aug 14 at 16:58

Fabio

678

answered Aug 14 at 16:58

Fabio

678

answered Aug 14 at 16:58

Fabio

678

answered Aug 14 at 16:58

Fabio

678

I can compile your code but I can also compile the code of my answer. What is the error messsage you get? If you want, you can send me the log file. My email : fpantigny@wanadoo.fr
â€“Â F. Pantigny
Aug 14 at 18:25

The error is "Package pgf Error: No shape named 2-4 is known". and the same for 4-4. I'll send you the log file.
â€“Â Fabio
Aug 17 at 22:10

add a commentÂ |Â

I can compile your code but I can also compile the code of my answer. What is the error messsage you get? If you want, you can send me the log file. My email : fpantigny@wanadoo.fr
â€“Â F. Pantigny
Aug 14 at 18:25

The error is "Package pgf Error: No shape named 2-4 is known". and the same for 4-4. I'll send you the log file.
â€“Â Fabio
Aug 17 at 22:10

I can compile your code but I can also compile the code of my answer. What is the error messsage you get? If you want, you can send me the log file. My email : fpantigny@wanadoo.fr
â€“Â F. Pantigny
Aug 14 at 18:25

The error is "Package pgf Error: No shape named 2-4 is known". and the same for 4-4. I'll send you the log file.
â€“Â Fabio
Aug 17 at 22:10

add a commentÂ |Â

up vote
0
down vote

You can construct a zero-width array next to your matrix containing elements that match the height of the matrix rows. This way you can place a right} where needed:

enter image description here

documentclassarticle

usepackageamsmath

begindocument

[
 A = beginpmatrix
 a_1 & cdots & a_N \
 b_1 & cdots & b_N \
 vdots & & vdots \
 z_1 & cdots & z_N \
 endpmatrix
 setlengtharraycolsep0pt % Avoid any column space in arrays that follow
 beginarray c 
 vphantoma_N \ % First row
 left.kern-nulldelimiterspace
 vphantombeginarray c 
 b_N \ % Second row
 vdots \ % Third row
 z_N % Fourth/last row
 endarray
 right}text$n_1$ times
 endarray
]

enddocument

answered Aug 14 at 17:09

Werner

421k589141582

add a commentÂ |Â

up vote
0
down vote

You can construct a zero-width array next to your matrix containing elements that match the height of the matrix rows. This way you can place a right} where needed:

enter image description here

documentclassarticle

usepackageamsmath

begindocument

[
 A = beginpmatrix
 a_1 & cdots & a_N \
 b_1 & cdots & b_N \
 vdots & & vdots \
 z_1 & cdots & z_N \
 endpmatrix
 setlengtharraycolsep0pt % Avoid any column space in arrays that follow
 beginarray c 
 vphantoma_N \ % First row
 left.kern-nulldelimiterspace
 vphantombeginarray c 
 b_N \ % Second row
 vdots \ % Third row
 z_N % Fourth/last row
 endarray
 right}text$n_1$ times
 endarray
]

enddocument

answered Aug 14 at 17:09

Werner

421k589141582

add a commentÂ |Â

up vote
0
down vote

You can construct a zero-width array next to your matrix containing elements that match the height of the matrix rows. This way you can place a right} where needed:

enter image description here

documentclassarticle

usepackageamsmath

begindocument

[
 A = beginpmatrix
 a_1 & cdots & a_N \
 b_1 & cdots & b_N \
 vdots & & vdots \
 z_1 & cdots & z_N \
 endpmatrix
 setlengtharraycolsep0pt % Avoid any column space in arrays that follow
 beginarray c 
 vphantoma_N \ % First row
 left.kern-nulldelimiterspace
 vphantombeginarray c 
 b_N \ % Second row
 vdots \ % Third row
 z_N % Fourth/last row
 endarray
 right}text$n_1$ times
 endarray
]

enddocument

answered Aug 14 at 17:09

Werner

421k589141582

You can construct a zero-width array next to your matrix containing elements that match the height of the matrix rows. This way you can place a right} where needed:

enter image description here

documentclassarticle

usepackageamsmath

begindocument

[
 A = beginpmatrix
 a_1 & cdots & a_N \
 b_1 & cdots & b_N \
 vdots & & vdots \
 z_1 & cdots & z_N \
 endpmatrix
 setlengtharraycolsep0pt % Avoid any column space in arrays that follow
 beginarray c 
 vphantoma_N \ % First row
 left.kern-nulldelimiterspace
 vphantombeginarray c 
 b_N \ % Second row
 vdots \ % Third row
 z_N % Fourth/last row
 endarray
 right}text$n_1$ times
 endarray
]

enddocument

answered Aug 14 at 17:09

Werner

421k589141582

answered Aug 14 at 17:09

Werner

421k589141582

answered Aug 14 at 17:09

Werner

421k589141582

answered Aug 14 at 17:09

Werner

421k589141582

add a commentÂ |Â

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