[Tex/LaTex] Creating tables with spanning rows/columns

tables

I'm trying to create a table which looks like

this

but I'm not really sure how to incorporate multiple spanning rows and columns together (to add 'Organism 1' and 'Organism 2'). I've gotten to this point so far:


\documentclass[a4paper,10pt]{article}
\usepackage[utf8x]{inputenc}
\usepackage{amsmath}

\begin{document}
\begin{tabular}{r|c|c|}
\multicolumn{1}{r}{}
 &  \multicolumn{1}{c}{$S$}
 & \multicolumn{1}{c}{$T$} \\cline{2-3}
$S$ & $a,a$ & $b,c$ \\cline{2-3}
$T$ & $c,b$ & $d,d$ \\cline{2-3}
\end{tabular}

\end{document}

And it currently looks like this:

column spanning table

Can anyone suggest how to add the top 'Organism 2' and left 'Organism 1' row/column entries?

thanks!

Best Answer

starting from your code, I got to this:

enter image description here

Basically, I have added the package multirow and changed the cline indexes.

\documentclass[a4paper,10pt]{article}
\usepackage[utf8x]{inputenc}
\usepackage{amsmath}
\usepackage{multirow}

\begin{document}
\begin{tabular}{cr|c|c|}
  \multicolumn{2}{r}{} & \multicolumn{2}{c}{Organism 2} \\

  \multicolumn{2}{r}{}
 & \multicolumn{1}{c}{$S$}
 & \multicolumn{1}{c}{$T$} \\

  \cline{3-4}


  \multirow{2}{*}{Organism 1} & $S$ & $a,a$ & $b,c$ \\
  \cline{3-4}

 & $T$ & $c,b$ & $d,d$ \\
  \cline{3-4}
\end{tabular}

\end{document}
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