Automatic table row numbers

Question

Is there any way to get automatic row numbers in table?

For example, if I define table contents as

\begin{tabular} % black magic column definition
   \rownumber & foo\\
   \rownumber & bar\\
   \rownumber & baz\\
\end{tabular}

and get something like

1 | foo
2 | bar
3 | baz

Duplicate question: How to enumerate the rows of a table – koppor Oct 20 '15 at 13:02 — koppor, Oct 20 '15 at 13:02

score 45 · Accepted Answer · 2018-12-08T10:36:00.690

45

\documentclass{article}
\usepackage{array,etoolbox}
\preto\tabular{\setcounter{magicrownumbers}{0}}
\newcounter{magicrownumbers}
\newcommand\rownumber{\stepcounter{magicrownumbers}\arabic{magicrownumbers}}
\begin{document}

\begin{tabular}{@{\makebox[3em][r]{\rownumber\space}} | r}
  Something \\
  Other stuff \\
  MAGIC!
\end{tabular}

\end{document}

output

If you want to start with the second row use

\documentclass{article}
\usepackage{array,etoolbox}
\preto\tabular{\setcounter{magicrownumbers}{0}}
\newcounter{magicrownumbers}
\def\rownumber{}
\begin{document}

\begin{tabular}{@{\makebox[3em][r]{\rownumber\space}} | r}
  Something 
  \gdef\rownumber{\stepcounter{magicrownumbers}\arabic{magicrownumbers}} \\
  Other stuff \\
  MAGIC!
\end{tabular}

\end{document}

output

If one wants a heading for the columns use:

\documentclass{article}
\usepackage{array,etoolbox}
\preto\tabular{\setcounter{magicrownumbers}{0}}
\newcounter{magicrownumbers}
\newcommand\rownumber{\stepcounter{magicrownumbers}\arabic{magicrownumbers}}
\begin{document}

\begin{tabular}{@{\makebox[3em][r]{\rownumber\space}} | r}
\multicolumn{1}{@{\makebox[3em][r]{ID~}} | r}{\emph{whatever}}\\    
        Something \\
        Other stuff \\
        MAGIC!
\end{tabular}

\end{document}

edited Dec 08 '18 at 10:36

answered Jun 21 '11 at 11:59

1

Is it possible to start numbering at the second line? i.e. have a header row? TIA. – Fabian Tamp Oct 10 '12 at 12:00
@Herbert Is it possible what Fabian asked? Starting at the second or third line? – Isai Jun 29 '13 at 05:22
2

edit the command \rownumber that it test the value:\ifnum\themagicrownumber>2\relax\arabic{magicrownumbers}\fi` then it puts only the number at the third row – Jun 30 '13 at 07:08
1

@Herbert Do you mean replace \begin{tabular}{@{\makebox[3em][r]{\rownumber\space}} | r}
with \begin{tabular}{@{\makebox[3em][r]{\ifnum\themagicrownumber>2\relax\arabic{magicrownumbers}\fi\space}} | r}

? When I do that, I get "Undefined control sequence" errors.
– David Doria Jul 07 '14 at 14:21
@FabianTamp: for the first (column in the first) line use \multicolumn{1}{r}{stuff} and it should not be numbered. – Jul 07 '14 at 14:40
@FabianTamp just add \addtocounter{magicrownumbers}{-1}before the line of \newcommand this will start the number on second row. – nellix1 Jun 30 '15 at 03:52
@Herbert, can you please show more explicitly how to make numbering begin with the second row? Perhaps an example with two columns also? – littleO Sep 03 '15 at 22:30
1

@littleO: see my edited answer – Sep 05 '15 at 07:10
@Herbert How to do this for attendance sheet? see https://tex.stackexchange.com/questions/409618/latex-tables-vertical-line-not-shown – alhelal Jan 18 '18 at 15:51
Is it possible to add a header for the numbers as well? By header, I mean the first row --- in your example, 'Something'; I want something like 'ID' above the numbers. – bp99 Dec 07 '18 at 18:37
sure, use \multicolumn{1}{c}{ID} – Dec 07 '18 at 20:37
@Herbert thank you, but how exactly? Forgive my ignorance, but where do I put the multicolumn? I have a tabularx with columns like id | col1 | col2. So far, using the counter I had to put \rowcount in each row for the first column. I though I could improve this by removing the first column and using that @{ ... } thing (macro before each row??), but that way I won't be able to put the word id above the first column. Am I missing something? – bp99 Dec 08 '18 at 05:46
1

see edited anwer (at the end) – Dec 08 '18 at 10:36

score 43 · Answer 2 · edited Sep 06 '18 at 16:46

43

You could just make it use a counter...

\documentclass{article}
\newcounter{magicrownumbers}
\newcommand\rownumber{\stepcounter{magicrownumbers}\arabic{magicrownumbers}}
\begin{document}
\begin{tabular}{l|r}
  \rownumber & Something \\
  \rownumber & Other stuff \\
  \rownumber & MAGIC!
\end{tabular}
\end{document}

edited Sep 06 '18 at 16:46

alhelal

2,451

answered Jun 21 '11 at 11:51

Seamus

73,242

2

Is there any frendly way to reset the counter between tables? – miah Jun 21 '11 at 11:56
4

@miah: Load etoolbox and say \preto\tabular{\setcounter{magicrownumbers}{0}} – egreg Jun 21 '11 at 11:58
6

@egreg I put that before my second table but the counter did not reset. I had to use simply \setcounter{magicrownumbers}{0} instead – David Doria Jul 07 '14 at 14:27
@DavidDoria That code should go in the preamble. – egreg Jul 07 '14 at 14:29
@egreg Hm, even with that in the preamble, the row numbers do not reset for me unless I clear the counter manually as I explained. – David Doria Jul 07 '14 at 15:05
@DavidDoria Did you add \usepackage{etoolbox} before doing \preto? – egreg Jul 07 '14 at 15:12
@egreg Yes I did. – David Doria Jul 07 '14 at 17:13
@DavidDoria My experiment works. You can open a new question with a minimal example. – egreg Jul 07 '14 at 17:15
@egreg Ah, my mistake indeed. Again a MWE saves the day. I was using the tabu package instead of tabular in my real document, so I just changed the preto command to \preto\tabu and all is well. Thanks for the help and sorry for the confusion! – David Doria Jul 07 '14 at 17:53
To clear the counter, \setcounter{magicrownumbers}{0} was enough for me too. I did not use \preto or \usepackage{etoolbox}. – Jim C Feb 25 '15 at 05:28
This works perfectly for me! – umit1010 Sep 12 '23 at 04:18

score 2 · Answer 3 · answered Apr 22 '21 at 18:40

The environment {NiceTabular} of nicematrix has its own built-in counter for the rows called iRow.

\documentclass{article}
\usepackage{nicematrix}
\begin{document}
\begin{NiceTabular}{>{\arabic{iRow}}c|c}
&  Something \
&  Other stuff \
&  MAGIC!
\end{NiceTabular}
\end{document}

morbusg · Answer 4 · 2011-06-21T16:22:57.357

0

A quick plain-format version as well for completenes:

\newcount\rowcount
\def\myhalign#1{\halign{\global\advance\rowcount by 1 \the\rowcount\quad##&#1}\rowcount=0}
% Yes, yes, next up in *sniping*: "One problem: you can't use repeating preamble"...
\myhalign{#\hfil\cr
  blah\cr
  foo\cr}
\halign{#\hfil\cr
  bar\cr
  baz\cr}
\myhalign{&#\hfil\cr
  asdf&asdf&asdf\cr
  sdfg&asdf&dfgh\cr}
\myhalign{#\hfil&&\hfil#\cr
  doesn't&work\cr
  boo&hoo\cr}
\bye

edited Jun 21 '11 at 16:22

answered Jun 21 '11 at 14:34

morbusg

25,490
4
81
162

Two problems. 1. Every subsequent \halign will advance the counter even if it doesn't need it. 2. If a row shouldn't be numbered (a header), omitting \the\rowcount would not avoid stepping the counter. The stepping should go in the table preamble. – egreg Jun 21 '11 at 14:48
@egreg I wasn't aiming for a be-all-end-all solution; just an answer to the question. – morbusg Jun 21 '11 at 14:51
@egreg: You don't need the @<username>-notation when you're addressing your comment to the answerer/questioner. – morbusg Jun 21 '11 at 14:57

Automatic table row numbers

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