Footnote inside table

Question

I want to use footnote inside a table and I have a table that looks like this (simplified for brevity):

\documentclass[a4paper]{paper}
\begin{document}

\begin{table}[h]
\centering
\resizebox{\textwidth}{!}{
\begin{tabular}{|*{4}{c|}}
\hline
\multirowcell{3}{Work} & \multirowcell{3}{Language} & \multirowcell{3}{Prime} & \multirowcell{3}{Time (ms)} \\ 
\hline \hline
Microsoft \footnote{\url{https://github.com/Microsoft/PQCrypto-SIDH}} & C & $2^{372}3^{239} - 1$ &  \\ \hline
Cloudflare \footnote{\url{https://github.com/cloudflare/p751sidh}} & Go & $2^{372}3^{239} - 1$ &    \\ \hline
\end{tabular}}
\caption{Comparison}
\label{tab:comp}
\end{table}

\end{document}

This shows the footnote numbers, but the footnote text is not appearing at the bottom of the page. I tried some solutions from here, but didn't succeed with anything. Any ideas what the problem might be and how to correct it?

score 4 · Answer 1 · answered Apr 02 '18 at 13:50

If you want the footnotes to appear with the table, you can include everything in a minipage of the appropriate width.

\documentclass[a4paper]{paper}
\usepackage{url}
\usepackage{multirow}
\usepackage{makecell}
\begin{document}
\begin{table}[h]
\begin{minipage}{\textwidth} % so footnote will appear
\renewcommand*\footnoterule{}
\centering
\begin{tabular}{|*{4}{c|}}
\hline
\multirowcell{1}{Work} & \multirowcell{1}{Language} & \multirowcell{1}{Prime} & \multirowcell{1}{Time (ms)} \\ 
\hline \hline
Microsoft\footnote{\url{https://github.com/Microsoft/PQCrypto-SIDH}}  & C & $2^{372}3^{239} - 1$ &  \\ \hline
Cloudflare\footnote{\url{https://github.com/cloudflare/p751sidh}}  & Go & $2^{372}3^{239} - 1$ &    \\ \hline
\end{tabular}
\end{minipage}
\caption{Comparison}
\label{tab:comp}
\end{table}
\end{document}

samcarter_is_at_topanswers.xyz · Accepted Answer · 2018-04-08T13:11:50.390

The main problem can be solved by using \footnotemark and \footnotetext separately.

Some other comments:

Several packages are missing
please do not use \resizebox for tables, choose an appropriate fontsize instead, see Why not scale elements that contain text for some explanation
your first row had too many entries, 4 times 3 = 12 cells!

\documentclass[a4paper]{paper}

\usepackage{url}
\usepackage{multirow}
\usepackage{makecell}

\newcounter{footnotesintable}

\begin{document}

\footnote{bla}

\begin{table}[htbp]
\centering
\setcounter{footnotesintable}{0}
\begin{tabular}{|*{4}{c|}}
\hline
\multirowcell{1}{Work} & \multirowcell{1}{Language} & \multirowcell{1}{Prime} & \multirowcell{1}{Time (ms)} \\ 
\hline \hline
Microsoft \addtocounter{footnote}{1}\addtocounter{footnotesintable}{1}\footnotemark[\thefootnote]  & C & $2^{372}3^{239} - 1$ &  \\ \hline
Cloudflare \addtocounter{footnote}{1}\addtocounter{footnotesintable}{1}\footnotemark[\thefootnote]  & Go & $2^{372}3^{239} - 1$ &    \\ \hline
\end{tabular}
\caption{Comparison}
\label{tab:comp}
\end{table}

\addtocounter{footnote}{-\thefootnotesintable}
\addtocounter{footnote}{1}\footnotetext[\thefootnote]{\url{https://github.com/Microsoft/PQCrypto-SIDH}}
\addtocounter{footnote}{1}\footnotetext[\thefootnote]{\url{https://github.com/cloudflare/p751sidh}}


\footnote{bla}
\end{document}

Thanks, this seems to work nicely, but I have previously used at some places \footnote, hence, is there any way with \foornotemark to continue from the last used footnote number, instead of manually specifying the footnote number? — pixel, Apr 02 '18 at 13:58

score 3 · Answer 3 · answered Apr 02 '18 at 13:58

You can use a longtable environment. Don't use \resizebox for tables, as it leads to inconsistent font sizes. You can use tabularx or tabular* instead.

\documentclass[a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage{makecell, tablefootnote, longtable}
\usepackage{url}
\usepackage{hyperref}

 \begin{document}

 \vspace*{15cm}
{\setlength{\extrarowheight}{3pt}
\begin{longtable}{|*{4}{c|}}
\caption{Comparison}
\label{tab:comp}\\
\hline
\endfirsthead
\hline
\endfoot
\multirowcell{3}{Work} & \multirowcell{3}{Language} & \multirowcell{3}{Prime} & \multirowcell{3}{Time (ms)} \\
\hline \hline
Microsoft \footnote{\url{https://github.com/Microsoft/PQCrypto-SIDH}} & C & $2^{372}3^{239} - 1$ & \\ \hline
Cloudflare \footnote{\url{https://github.com/cloudflare/p751sidh}} & Go & $2^{372}3^{239} - 1$ &
\end{longtable}}

\end{document}

Thanks for the nice answer. If I use tabularx or tabular*, then how can I use the footnotes? I mean do I also have to embed the longtable inside it? Since my tables are long (I partially removed them for brevity), I need a good way to fit them inside the margin. I didn't know that \resizebox is problematic. — pixel, Apr 02 '18 at 14:08
For \ tabularx, you can load theltablexpackage, which makes tabularx a longtable, breakable across pages (not tested with footnotes, though). You'll find information on the various possibilities in the (short) documentation of thetablefootnote` package. — Bernard, Apr 02 '18 at 14:12

Footnote inside table

3 Answers3