Insert loop inside table?

Question

1- I want to make a table with n number of rows ?

my wrong code

\newcommand{\xx}{
\begin{tabular}{|c|c|c|}
\hline

\newcount\fooo
\fooo=10
\loop


11 & 12 & 13\\
\hline


\advance \fooo -1
\ifnum \fooo>0
\repeat 

\end{tabular}
}

I want the result like that using loop or any command

2- \def\abc{dd} create one value

I want command create multiple values

like \def-multiple \abc {dd,cc,vv,mm}

now i am using this code

\foreach \x in {1,...,\nRows} {\addtabtoks{ \abc(\x) & yyy & yyy \\\hline}}

the desired command is \abc(\x) or \abc(2) first loop type the first value of \abc second loop type the second value of \abc and so on

Welcome to the site! Have you seen How do I use the ampersand (&) inside a foreach or conditional (or other group/environment) when building tables?, How to programmatically make tabular rows using \whiledo ?, and Copy table row n times, for example? — cmhughes, Jun 08 '14 at 02:10
I do not understand, what \def\abc{dd} should do? Print out a cell content and \def\abc{dd,cc,vv,mm} the contents of 4 cells forming a table row? — , Jun 08 '14 at 03:51
@user286653: Alright, but does \def\abc{dd} etc. change within a table or should all rows look alike as in the table screenshot? — , Jun 08 '14 at 04:04
@ChristianHupfer no, every row contains different value or string that all are stored in \abc — user286653, Jun 08 '14 at 04:14
@user286653: Well, and how should the content change from one row to the next one? It must be computable within a loop, or in a other words: How do you 'feed' the macro \abc while advancing through the rows — , Jun 08 '14 at 04:17
@user286653 Why do you need so? I mean can you explain your exact situation? — hola, Jun 08 '14 at 04:24
Generating tables with computed content is basically no problem, but with 'arbitray' content, however, if the content comes from a file etc, this is different. — , Jun 08 '14 at 04:26
@ChristianHupfer sorry if i don't explain enough --- \foreach \x in {1,...,\nRows} {\addtabtoks{ \abs(\x) & yyy & yyy \\hline}} --- where \abs(\x) first loop type the first value of \abc ---- second loop type the second value of \abc --and so on **the exact case i'm trying to make automated latex code for describing different communication system blocks so the table for inputs and outputs and the same inputs and outputs used for drawing shapes and labeling this shape sorry for my bad English — user286653, Jun 08 '14 at 04:35
Please update your question with the explanation from your comment. — , Jun 08 '14 at 04:37

wipet · Accepted Answer · 2014-06-08T05:52:16.803

The table is implemented by \halign primitive where groups are allocated in cells, expansion process and scanning parameters of macros is somewhat more complicated in order to coordinate them with replacing declaration data for cells. This is reason why it is no good idea to do calculations and complicated macro expansion inside and across cells. It is possible but you have to know \halign behavior in detail and you need to know exactly what you and TeX are doing.

But more simple solution is possible. You can prepare \tabledata before table is processed. This work:

\documentclass[12pt]{article}

\newcount\fooo
\long\def\addto#1#2{\expandafter\def\expandafter#1\expandafter{#1#2}}

\begin{document}

\def\tabledata{} \fooo=10
\loop
   \addto\tabledata{11 & 12 & 13\\
                    \hline}
   \advance \fooo -1
   \ifnum \fooo>0
\repeat 

\begin{tabular}{|c|c|c|}
   \hline
   \tabledata
\end{tabular}

\end{document}

When you need to insert something what depends on the loop variable, then you have to expand it inside the loop. But other fragile macros cannot be expanded. For example you need to insert the value of loop variable. Then you can do it by this:

   \edef\tabline{\the\fooo & 12 & 13}
   \expandafter\addto\expandafter\tabledata\expandafter{\tabline \\ \hline}

score 2 · Answer 2 · answered Jun 08 '14 at 05:03

This is a LaTeX solution, with a \forloop from forloop package. It builds a tabular array with a command \maketablerows{number_of_rows}{rowcontent}, where rowcontent is suspected to hold the values for the cells in a row, either direct or via a command.

\documentclass[paper=a4,12pt]{scrbook}

\usepackage{forloop}%
\usepackage{etoolbox}%



\begin{document}

\makeatletter
\newcounter{column@@counter}
\newcounter{row@@counter}

\newcounter{inner@@counter}%


\edef\t@@blerow{}%
\edef\t@@blerowtemp{}%

\newrobustcmd{\singletablerow}[3]{%
#1  & #2 & #3 
}%



\newrobustcmd{\maketablerows}[2]{%
\setcounter{row@@counter}{0}%
\forloop{row@@counter}{0}{\number\value{row@@counter} < #1}{%
\setcounter{inner@@counter}{\number\value{row@@counter}}%
\stepcounter{inner@@counter}%
\ifnumequal{\number\value{inner@@counter}}{#1}{%
#2% 
}{%
#2 \tabularnewline%
%\hline
}%
}%
}%

\begin{tabular}{lll}
%\hline%
\maketablerows{10}{\singletablerow{11}{12}{13}}%
\tabularnewline%
%\hline%
\end{tabular}

\makeatother


\end{document}

Insert loop inside table?

2 Answers2

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