I'm trying to create a matrix table that will iteratively fill in the cells based on inputs that I can change. I originally tried the solution shown here, but I wasn't able to get Latex to properly expand when I was actually using the iterative value \i in the cells, rather than pure text like t1 and t2.
So I also came across this great solution here, which did work with inputting \i as a value. However, I'm having problems when doing mathematical operations on that \i and further values. In accordance with that second solution, here's my MWE:
\documentclass[]{article}
\usepackage{tikz}
\usepackage{tabularx}
\begin{document}
\newcommand\costsmall{60}
\newcommand\costmed{80}
\newcommand\costlarge{100}
\newcommand\rentsmall{10}
\newcommand\rentmed{15}
\newcommand\rentlarge{20}
\makeatletter
\newtoks\@tabtoks
\newcommand\addtabtoks[1]{\global\@tabtoks\expandafter{\the\@tabtoks#1}}
\newcommand\eaddtabtoks[1]{\edef\mytmp{#1}\expandafter\addtabtoks\expandafter{\mytmp}}
\newcommand*\resettabtoks{\global\@tabtoks{}}
\newcommand*\printtabtoks{\the\@tabtoks}
\makeatother
\resettabtoks
\addtabtoks{\textbf{Num1} & \textbf{Num2} & \textbf{Num3} & \textbf{Num2/Num3}\\ \cline{1-4}}
\foreach \x [count=\xi] in {\costsmall,\costmed,\costlarge}{
\foreach \y [count=\yi] in {\the\numexpr\x - 10,\the\numexpr\x,\the\numexpr\x + 10}{
\foreach \z [count=\zi] in {\rentsmall,\rentmed,\rentlarge}{
\ifnum\zi=2 {
\ifnum\yi=2 {
\eaddtabtoks{\x}
}
\else {
}
\fi
\addtabtoks{&}
\eaddtabtoks{\y}
\addtabtoks{&}
}
\else {
\addtabtoks{ & & }
}
\fi
\eaddtabtoks{\z }
\addtabtoks{&}
% \newcommand{\testthing}[2]{y is #1, z is #2, and together they are #1/#2}
% \testthing{\y}{\z}
\eaddtabtoks{\y/\z}
\addtabtoks{\\}
\ifnum\zi=3 {
\ifnum\yi=3 {
\addtabtoks{ \cline{1-4} }
}
\else{
\addtabtoks{ \cline{2-4} }
}
\fi
}
\fi
}
}
}
\begin{tabularx}{\textwidth}{|c|c|c|c|c|}
\printtabtoks
\end{tabularx}%
\end{document}
As a result, I get this plot, where the "# of rents to pay off" has clearly been calculated incorrectly for most of the cases:
In this code, this is at the \eaddtabtoks{\y/\z} line. I've been able to trace it back and find that it's failing in all the cases where \y has 10 subtracted or added to it in the \foreach line. In those cases, it looks like a strange order of operations takes hold, or the 10 is not seen as a number or something. I've played with the \y/\z line endlessly, trying different options of \the\numexpr and brackets and parentheses to get the order of operations done correctly, but nothing seems to work.
As a side note, I did have to use this janky \ifnum\zi=2 method of centering the first few multicolumns because I couldn't get multicolumns to work with this method. \multicolumn{9}{*}{random} worked fine with a string like random, but once I put in an iterator like \x or \y, I got errors that I couldn't fix.
\documentclass, ends with\end{document}and can be compiled, many more users will look at your code. – Jun 22 '19 at 16:59tabularxcan do nothing useful with a preamble of\begin{tabularx}{\textwidth}{|c|c|c|c|c|}just usetabular. The tabularx version is evaluated multiple times with trial column widths which makes embedding calculations interesting,m but you do not want tabularx here anyway. – David Carlisle Jun 22 '19 at 17:1210in that calculation – David Carlisle Jun 22 '19 at 17:20\foreach \yline with\foreach \y [count=\yi, evaluate=\y as \ey using {int(\x+\yi*10)}] in {-1,0,1} {...}and then using\eylater. Secondly, will there always be three rent and three cost prices or can these vary? For what it is worth, I would not use\foreachto create tables like this. Your problem is almost certainly that\foreachworks inside a group so values will not be remembered outside the loop -- you could try usingremember=...in the\foreachbut better to rewrite with other tools. – Jun 23 '19 at 01:17\RentCosts{60,80,100}{10,15,20}{20}would produce your table. – Jun 23 '19 at 23:19