3

The MWE below should clearly demonstrate my problem. If I pass too large values, I get the error Dimension too large. <to be read again>. If I pass a command \list as the list, I get the errors

Package PGF Math: Unknown function 'Contribution' (in '(0) + ( 100/Contribution, 50/Fundraising, 5/Grants )').
Package PGF Math: You've asked me to divide `0.0' by `0', but I cannot divide any number by `0' (in '0.5*((0.0pt)/(0)*360+(0))+0.5*(0.0pt/(0)*360+(0))').
Arithmetic overflow. \pgfmathdivide@ ...\pgfmath@x by\c@pgfmath@counta

I feel like I'm trying to do simple things, but I couldn't find any solutions on the internet.

MWE

\documentclass{article}

\usepackage{pgf-pie}

\begin{document}

    % This works
    \begin{tikzpicture}
        \pie[
            sum = auto
        ]{
            100/Contribution,
            50/Fundraising,
            5/Grants
        }
    \end{tikzpicture}

    % This doesn't work
    \begin{tikzpicture}
        \pie[
            sum = auto
        ]{
            100000/Contribution,
            50000/Fundraising,
            5000/Grants
        }
    \end{tikzpicture}

    % This doesn't work either
    \def\list{
        100/Contribution,
        50/Fundraising,
        5/Grants
    }
    \begin{tikzpicture}
        \pie[
            sum = auto
        ]{\list}
    \end{tikzpicture}

\end{document}
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2 Answers 2

Reset to default
1

PGF/TikZ works with dimensions in points (pt) and is constrained by TeX's internal dimension limits (maximum around 16384pt). Therefore, the correct solution is to divide all values by a common factor. As far as I know, PGF does not automatically expand macros inside \pie{...}. Use \edef or \expanded\pie:

\documentclass{article}
\usepackage{pgf-pie}

\begin{document}

\def\mydata{100/Contribution, 50/Fundraising, 5/Grants}
\begin{tikzpicture}
    \edef\temp{\noexpand\pie[sum=auto]{\mydata}} 
    \temp   
\end{tikzpicture}
% or
% \begin{tikzpicture}
%    \expanded{\noexpand\pie[sum=auto]{\mydata}}
% \end{tikzpicture}

\end{document}

enter image description here

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1

A first solution uses the key before number with a command to multiply the values with 1000.

\documentclass[border=6pt]{standalone}
\usepackage{pgf-pie}
\begin{document}
\begin{tikzpicture}
\def\mycommand#1{\fpeval{#1*1000}}
\pie[
  before number=\mycommand,
  sum=auto
]{
  100/Contribution,
  50/Fundraising,
  5/Grants
}
\end{tikzpicture}
\end{document}

cannot-pass-command-with-large-values-as-list-to-pie-chart-using-pgf-pie-package_1

A second solution uses the wheelchart package, which I wrote. Then larger numbers can be used directly.

\documentclass[border=6pt]{standalone}
\usepackage{wheelchart}
\begin{document}
\begin{tikzpicture}
\wheelchart[
  counterclockwise,
  pie,
  slices style={\WCvarB,draw=black,thick,line join=bevel},
  start angle=0,
  wheel data=\WCvarA
]{%
  100000/blue!60/Contribution,
  50000/cyan!60/Fundraising,
  5000/yellow!60/Grants%
}
\end{tikzpicture}
\end{document}

cannot-pass-command-with-large-values-as-list-to-pie-chart-using-pgf-pie-package_2

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