Cfrgtkky

I'm trying to make a Cayley table like the one in the following question, but I don't want the labels eg on top (Capacity) and on the left side (the w's and v's), I just would like to reproduce the exact same table without the 'extra' bits on the side.

I forgot to mention I want a 5x5 table (25 entries inside the table) but still with the "outer" headings.

EDIT: I managed to do this however this is long winded I think:

[

    begin{tabular}{>{$}l<{$}|*{6}{>{$}l<{$}}}

    ~   & 1   & a   & a^2 & a^3   & a^4     \

    hlinevrule height 12pt width 0pt

    1   & 1   & a   & a^2 & a^3  & a^4      \

    a   & a   & a^2 & a^3 & a^4  & a^5      \

    a^2 & a^2 & a^3 & a^4 & a^5  & a^6      \

    a^3 & a^3 & a^4 & a^5 & a^6  & a^7      \

    a^4 & a^4 & a^5 & a^6 & a^7  & a^8      \

    end{tabular} 

]

Basically I've just taken the answer to the question you linked and changed few lines to adapt to your needs.

Here's the code, followed by the output you will get and a brief explanation of what's going on.

documentclass[10pt]{article}

usepackage{array}



begin{document}



setlengthextrarowheight{3pt}

begin{tabular}{c | c c c c c}



$i$ & 0 & 1 & 2 & 3 & 4  \

cline{1-6}

0 & 0 & 0 & 0 & 0 & 0 \

1 & 0 & 0 & 0 & 25 & 25 \

2 & 0 & 0 & 20 & 25 & 25 \

2 & 0 & 0 & 20 & 25 & 25 \

2 & 0 & 0 & 20 & 25 & 25 \

end{tabular}



end{document}

How does it work? A table is done with the environment {tabular}, which requires as argument the numer of columns (or rows... just read the documentation to know more) which is specified by the argument {c | c c c c c}: 6 columns divided by a line between the first and the second col. The 'c' stands for centered meaning that the column will be aligned to the center, if you want you can change it to l (left) or r (right).

Then in the tables all the entries are done by spacing them with &, and the cline takes as argument the number of columns that you want it to span: from column 1 to column 6.

The command setlengthextrarowheight{3pt} adds some extra row height (how surprising!).

Package {array} is needed for the length extrarowheight.

Your input is almost good, but you can do better.

documentclass{article}

usepackage{amsmath}

usepackage{array}



begin{document}



This is a Cayley table

[

    begin{array}{l|*{6}{l}}

        & 1   & a   & a^2 & a^3  & a^4 \

    hline

    1   & 1   & a   & a^2 & a^3  & a^4 \

    a   & a   & a^2 & a^3 & a^4  & a^5 \

    a^2 & a^2 & a^3 & a^4 & a^5  & a^6 \

    a^3 & a^3 & a^4 & a^5 & a^6  & a^7 \

    a^4 & a^4 & a^5 & a^6 & a^7  & a^8 \

    end{array} 

]



This is the same, but with some more spacing,

[

    setlength{extrarowheight}{3pt}% local setting

    begin{array}{l|*{6}{l}}

        & 1   & a   & a^2 & a^3  & a^4 \

    hline

    1   & 1   & a   & a^2 & a^3  & a^4 \

    a   & a   & a^2 & a^3 & a^4  & a^5 \

    a^2 & a^2 & a^3 & a^4 & a^5  & a^6 \

    a^3 & a^3 & a^4 & a^5 & a^6  & a^7 \

    a^4 & a^4 & a^5 & a^6 & a^7  & a^8 \

    end{array} 

]



end{document}

With array, each cell is assumed to be in math mode. The setting of extrarowheight will not propagate to other instances of array, because [...] forms a group.