Ndtyhij

I made the following table:

documentclass{article}

usepackage{multirow}

usepackage{multicol}



begin{document}



defarraystretch{1.5}

    begin{tabular}{|c|c|ccc|} hline

         &  & multicolumn{3}{c|}{Actual} \ hline

         & Class & Low & Med. & High \ hline

         multirow{3}{*}{Prediction} & Low & $0$ & $0$ & $0$ \

         & Med. & $10$ & $98$ & $1$ \

         & High & $0$ & $0$ & $0$ \ hline

    end{tabular}



end{document}

Here is the result:

I am just curious if there is any way to get rid of the lines around the boxes that have nothing in them?

There is no need of multicol here.

documentclass{article}

usepackage{multirow}

begin{document}

defarraystretch{1.5}

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

    cline{3-5}

    multicolumn{1}{c}{} & & multicolumn{3}{c|}{Actual} \ cline{2-5}

    multicolumn{1}{c|}{} & Class & Low & Med. & High \ hline

     multirow{3}{*}{Prediction} & Low & $0$ & $0$ & $0$ \

     & Med. & $10$ & $98$ & $1$ \

     & High & $0$ & $0$ & $0$ \ hline

end{tabular}

end{document}

I would suggest to omit all lines, looks better for me. In the following mwe I show both versions. Please see my pretty printing to be able to see the structure of the table faster ...

MWE [important code changings marked with <======]:

documentclass{article}

usepackage{multirow}

usepackage{multicol}



begin{document}



defarraystretch{1.5}

How about without lines:



begin{tabular}{c c ccc} %hline    

                              &       & multicolumn{3}{c}{Actual} \ %hline

                              & Class & Low  & Med. & High \ %hline

  multirow{3}{*}{Prediction} & Low   & $0$  & $0$  & $0$ \

                              & Med.  & $10$ & $98$ & $1$ \

                              & High  & $0$  & $0$  & $0$ \ %hline

end{tabular}



Version with lines:



begin{tabular}{|c|c|ccc|} cline{3-5} % <==============================

  multicolumn{2}{c}{}                & multicolumn{3}{|c|}{Actual} \ cline{2-5} % <===========

  multicolumn{1}{c|}{}       & Class & Low  & Med. & High \ hline % <========

  multirow{3}{*}{Prediction} & Low   & $0$  & $0$  & $0$  \ % <=======

                              & Med.  & $10$ & $98$ & $1$  \

                              & High  & $0$  & $0$  & $0$  \ hline

end{tabular}

end{document}

and its result: