mjhjmtu

I have this LaTeX code

documentclassarticle
usepackagediagbox
usepackageamsmath,array,graphicx

begindocument
 begintable[htb]
 centering
 captionClassifiaction
 labeltable:cc
 resizeboxcolumnwidth!%
 begintabular*2chline
 backslashboxClassificationModel
 & Model 1 & Model 2 & Model 3 & Model 4\hlinehline
 Class & Class 1 & beginitemize
 item Class 1 if $A=B$
 item Class 2 otherwise
 enditemize & Class 2 & Class 2\hline
 Method & Method 1 & Method 2 & Method 1 & Method 2\hline
 Time & Constant & Linear & Polylogarithmic & Exponential \hline
 endtabular
 
 endtable
enddocument

which produces a table that contains a cell with itemized bullets. The table looks ugly as the text is not centred inside the cell, there are some useless space for example in the cell with items, the lines are not equally spaced, etc.

How can I improve this table?

I have tried to use this method of adding itemized bullets How to use itemize in Table environment but I did not succeed, i.e., when I use tabitem ....\ tabitem ... the new item is not in the same cell but in a new line.

i would redesign your table in the following form:

(red lines indicate text area borders)

documentclassarticle
usepackagebooktabs, multirow
usepackage[skip=1ex]caption
usepackageenumitem

begindocument
 begintable[htb]
centering
setlengthtabcolsep0pt
 captionClassifiaction
 labeltable:cc
begintabular*linewidth@extracolsepfill *2l p0.28textwidth *2l 
 toprule
multirow2.2*Classification
 & multicolumn4cModel \
 cmidrule2-5
 & Model 1 & Model 2 & Model 3 & Model 4 \
 midrule
Class & Class 1 & beginitemize[nosep, leftmargin=*,
 before=vspace-0.6baselineskip,
 after =vspace-baselineskip
 ]
 item Class 1 if $A=B$
 item Class 2 otherwise
 enditemize
 & Class 2 & Class 2 \ midrule
Method & Method 1 & Method 2 & Method 1 & Method 2 \ midrule
Time & Constant & Linear & Polylogarithmic & Exponential \
 bottomrule
endtabular*
 endtable
enddocument

as you see, diagbox is replaced with new row for "Model", "Classification" is placed into multirow cell.

for table is used environment tabular*, its width is equal to text width, for the list is used enumitem package. vertical lines are removed, for horizontal ones are used rules from the package booktabs.

Like this:

documentclassarticle
usepackagediagbox
usepackageamsmath,array,graphicx

begindocument
renewcommand*arraystretch2
 begintable[htb]
 centering
 captionClassifiaction
 labeltable:cc
 resizeboxcolumnwidth!%
 begintabularchline
 backslashboxClassificationModel
 & Model 1 & Model 2 & Model 3 & Model 4\hlinehline
 Class & Class 1 & beginitemize
 item Class 1 if $A=B$
 item Class 2 otherwise
 enditemize & Class 2 & Class 2\hline
 Method & Method 1 & Method 2 & Method 1 & Method 2\hline
 Time & Constant & Linear & Polylogarithmic & Exponential \hline
 endtabular
 
 endtable
enddocument

You shouldn't use resizebox with tables – it leads to inconsistent font sizes. I propose a solution with the small fontsize, a reduced tabcolsep, a more decent text width with the geometry package and tabularx to make the table fit between margins. I reduced the first column width , playing with the height and width parameeters of diagbox. For the liqst problem, I think it will look nicer left aligned at the left border of the cell, and without verical spacing. Last, I replaced hline with hhline to have nicer intersections between vertical and horizontal rules.

documentclassarticle
usepackage[showframe]geometry 
usepackageamsmath, graphicx 
usepackagediagbox
usepackagearray, caption, tabularx, hhline
usepackageenumitem 

makeatletter
newcommand*compress@minipagetrue
makeatother

begindocument

 begintable[htb]
 centeringsmall
 setlengthextrarowheight2pt
 captionClassification
 setlengthtabcolsep2pt
 labeltable:cc
 begintabularxlinewidth
 hhline
 diagbox[height=7ex, width=9em]Classificationraisebox-1.6exModel
 & Model 1 & Model 2 & Model 3 & Model 4\
 hhline=::=::===
 Class & Class 1 & beginitemize[wide=0pt, leftmargin=*, topsep=0pt, itemsep =0pt, after=vspace-baselineskip]
 item Class 1 if $A=B$
 item Class 2 otherwise
 enditemize & Class 2 & Class 2\
 hhline
 Method & Method 1 & Method 2 & Method 1 & Method 2\
 hhline
 Time & Constant & Linear & Polylogarithmic & Exponential \
 hhline
 endtabularx
 endtable

enddocument 

Here's a solution that seems to provide what you want:

There are three keys here to what I'm doing:

• I've save the list in a box and prior to making the table. In the table I can then apply usebox to the box to obtain the already formatted content. By doing this, I can make the third column centers (as it appears you want). Using the minipage removes the unwanted white space from before and after the itemize list (provided there's no content outside of the list.


• By using raisebox, I'm basically able to give the appearance of adding a buffer of white space above and below the list. This is a bit of a misnomer since what I've really done is just told LaTeX that the box's height and depth are a bit larger than they really are. The syntax for raisebox is

raisebox<lift>
 [<optional height specification>]
 [<optional depth specification>]
 <content>

• I use struts to create some control over the spacing.

Here's the code:

documentclassarticle
usepackagediagbox
usepackageamsmath,array,graphicx

newcommandaestrut[2]rule[#1]0pt1pt%%
 rule[#2]0pt1pt
newcommandfixedstrutaestrut2.5ex-1.5ex

begindocument
newsaveboxaebox
beginlrboxaebox
 beginminipage0.4textwidth-6pt
 beginitemize
 item Class 1 if $A=B$
 item Class 2 otherwise
 enditemize 
 endminipage%%
endlrbox

begintable[htb]
 centering
 captionClassifiactionaestrut0pt-2ex
 labeltable:cc
 resizeboxcolumnwidth!%
 begintabularhline
 backslashboxfixedstrut Classification
 fixedstrut Model & 
 Model 1 & 
 Model 2 & 
 Model 3 & 
 Model 4 
 \hlinehline
 Class & 
 Class 1 & 
 raisebox0pt[height+2ex][depth+2.5ex]useboxaebox
 & 
 Class 2 & 
 Class 2 
 \hline
 aestrut3ex-2ex%%
 Method & 
 Method 1 & 
 Method 2 & 
 Method 1 & 
 Method 2
 \hline
 aestrut3ex-2ex%%
 Time & 
 Constant & 
 Linear & 
 Polylogarithmic & 
 Exponential 
 \hline
 endtabular
 
endtable

enddocument