How to create a multi column multi row table without borders in LaTeX?

Question

I just want to create a table like this

but without the in-between line among rows. I also don't need the line between columns like this

but below the Existing Methods CFNeT multi-column i need a line which doesn't span the full table. I mean that the line must fit into the content.

Answer 1

\documentclass[11pt]{article}
\usepackage{graphicx}

\begin{document}
  This a multirow and multicolumn table
    \begin{tabular}{|c|c|c|}
      \hline
       a & b & g\\
       \hline
       b & c & h\\
       \hline
       g & v & a\\
       \hline
   \end{tabular}

\end{document}

The | represent the vertical lines separating each element of the cell and c is the option to centre the cell's content (there are others like r -> right and l -> left).

Finally \hline stands for horizontal line. I hope I was clear enough.

Answer 2

You have to compile at least twice with every change in the percentage (last) column (since it uses eqparbox for getting the appropriate alignment).

\documentclass{book}

\usepackage[
  margin=1in,
  landscape
]{geometry} % Just for this example

\usepackage{booktabs,collcell,eqparbox,makecell}


\begin{document}

\begin{table}
  \centering
  \newcommand{\pa}[1]{\eqmakebox[CFNetvsNeuMF][r]{#1}}% Percentage alignment
  \newcommand{\hlc}{\textbf}% Highlight cell
  \caption{Comparison results of different methods in terms of NDCG@10 and HR@10.}
  \begin{tabular}{ *{9}{c} >{\collectcell\pa}c<{\endcollectcell} }
    \toprule
    &
    &
    \multicolumn{4}{c}{Existing methods} &
    \multicolumn{3}{c}{CFNet} &
    \\
    \cmidrule(lr){3-6}\cmidrule(lr){7-9}
    Dataset & % \raisebox{.7\normalbaselineskip}[0pt][0pt]{Dataset}
    Measures & % \raisebox{.7\normalbaselineskip}[0pt][0pt]{Measures}
    ItemPop & eALS & DMF & NeuMF &
    CFNet-rl & CFNet-ml & CFNet &
    \multicolumn{1}{c}{\smash{\makecell[b]{Improvement of \\ CFNet \emph{vs.} NeuMF}}} \\
    \midrule
    ml-1m &  HR  & 0.4535 & 0.7018 & 0.6565 & \hlc{0.7210} &
      0.7127 & 0.7073 & \hlc{0.7253} &
      0.6\% \\
          & NDCG & 0.2542 & 0.4280 & 0.3761 & \hlc{0.4387} &
      0.4336 & 0.4264 & \hlc{0.4416} &
      0.7\% \\
    \addlinespace
    lastfm &  HR  & 0.6628 & 0.8265 & 0.8840 & \hlc{0.8868} &
      0.8840 & 0.8834 & \hlc{0.8995} &
      1.4\% \\
           & NDCG & 0.3862 & 0.5162 & 0.5804 & \hlc{0.6007} &
      0.6001 & 0.5919 & \hlc{0.6186} &
      3.0\% \\
    \addlinespace
    AMusic &  HR  & 0.2483 & 0.3711 & 0.3744 & 0.3891 &
      0.3947 & \hlc{0.4071} & \hlc{0.4116} &
      5.8\% \\
           & NDCG & 0.1304 & 0.2352 & 0.2149 & 0.2391 &
      \hlc{0.2504} & 0.2420 & \hlc{0.2601} &
      8.8\% \\
    \addlinespace
    AToy &  HR  & 0.2840 & 0.3717 & 0.3535 & 0.3650 &
      0.3746 & \hlc{0.3931} & \hlc{0.4150} &
      13.7\% \\
         & NDCG & 0.1518 & \hlc{0.2434} & 0.2016 & 0.2155 &
      0.2271 & 0.2293 & \hlc{0.2513} &
      16.6\% \\
    \bottomrule
  \end{tabular}
\end{table}

\end{document}