LaTeX:tablefootnotes

Use the \footnotemark command:

 \begin{table}

 \begin{tabular}{l|l|l|l}\hline

 column 1 & column 2 & column 3\footnotemark[1] & column 4\footnotemark[2] \\\hline

 row 1    & data 1   & data 2                   & data 3                   \\

 row 2    & data 1   & data 2                   & data 3                   \\

 row 3    & data 1   & data 2                   & data 3                   \\\hline 

 \end{tabular}

 \footnotetext[1]{table footnote 1}

 \footnotetext[2]{table footnote 2}

 \caption{Table with rows, columns and footnotes}

 \label{tbl:data}

 \end{table}

and specify the content of the footnote with \footnotetext{footnote contents}. Notes:

• If you want to have footnotes inside captions, (sub)section titles etc, you should use \protect\footnotemark instead.
• Normally LaTeX does the numbering of footnotes for you, so you should be very careful when mixing normal \footnote{} and \footnotemark. You may want to increase the footnote counter using \addtocounter{footnote}{N}, after you've manually added your footnotes.
• In RevTex 4 \footnote works inside tables (still not inside captions and section titles), but the behavior is different from using \footnotemark. Footnotes made with \footnote inside a table, get typeset in letters ('a', 'b' etc), and are located directly below the table instead of at the bottom of the page.
• In the standard implementation of RevTeX 4, using the \footnote command in the text, the footnotes are added to the bibliography. You can change this behavior by the class option ''nofootinbib''.
• More footnote fun!