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I am trying to format a table using multirow and multicolumn. Most of it seems ok except that I am missing some borders and I would a line separator between row "Binary Classifier" and the row immediately beneath it (1 vs. 2) etc. I cannot seem to figure it out.

\begin{tabular}{|l|c|c|c|c|c|} \hline \multirow{2}{*}{Category} & \multicolumn{3}{c|} {Binary Classifier} & \multirow{2}{*}{Votes} & \multirow{2}{*}{Result}\\ & 1 vs. 2 & 1 vs. 3 & 2 vs. 3\\ \hline Class 1 & Win & Win & X & 2 & Win \\ \hline Class 2 & X & X & Win & 1 & X \\ \hline Class 3 & X & X & X & 0 & X \\ \hline \end{tabular}

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    First, you will get quicker assistance with a compilable MWE. Search this site for MWE for more information. Second, change line 5 to read ' & 1 vs. 2 & 1 vs. 3 & 2 vs. 3& &\\ ' because in each row you must account for all specified columns (you declared there would be six) Commented Jul 4, 2016 at 12:24

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Just add a \cline for the missing horizontal line and add the missing cells for the second row. 

% arara: pdflatex \documentclass{article} \usepackage{multirow} \usepackage{array} \begin{document} \begin{tabular}{|l|*{5}{c|}} \hline \multirow{2}{*}{Category} & \multicolumn{3}{c|}{Binary Classifier} & \multirow{2}{*}{Votes} & \multirow{2}{*}{Result} \\\cline{2-4} & 1 vs.\ 2 & 1 vs.\ 3 & 2 vs.\ 3 & & \\\hline Class 1 & Win & Win & X & 2 & Win \\\hline Class 2 & X & X & Win & 1 & X \\\hline Class 3 & X & X & X & 0 & X \\\hline \end{tabular} \end{document}

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Save yourself some trouble while making it look more beautiful. Here are some general advice on printing tables.

  • Don't use vertical lines, unless your table is meant to be read vertically.
  • Use some different widths of horizontal lines. The booktabs-package has som nice predefined lengths(along with some very good advice), namely \toprule,\midrule and \bottomrule.
  • Use a caption on top. (for figures, the caption can below it).
  • Don't write \begin{tabular}{|l|c|c|c|c|c|} with that many repeating items. use \begin{tabular}{|l|*{5}{c|}} if you reall want vertical lines, or \begin{tabular}{l*{5}{c}} without vertical lines. That way, you specify the number of columns you want of type c, instead of typing one by one.

Output

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Code

\documentclass[11pt]{article} \usepackage{booktabs} \usepackage{caption} \usepackage{multirow} \begin{document} \begin{table} \centering \caption{Some binary stuff\ldots} \begin{tabular}{l*{5}{c}} \toprule \multirow{2}{*}{Category} & \multicolumn{3}{c} {Binary Classifier} & \multirow{2}{*}{Votes} & \multirow{2}{*}{Result}\\ & 1 vs. 2 & 1 vs. 3 & 2 vs. 3\\ \midrule Class 1 & Win & Win & X & 2 & Win \\ Class 2 & X & X & Win & 1 & X \\ Class 3 & X & X & X & 0 & X \\ \bottomrule \end{tabular} \end{table} \end{document}
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