I want to create a pie chart in LaTeX. Do you know a package which manages that?
I tried datatool which uses tikz as backend but seems to be unusable due to mysterious floating point errors.
[Tex/LaTex] Package for pie charts
tikz-pgf
Related Solutions
Your commented solution is closer to the working one.
The idea of looping through the values and accumulating the sum in tmpSUM is quite right but:
- you may want to use
\pgfmathto support non-integer values - the body of the
\foreachis in a group so you need global assignments to make the value of the counter escape the scope of the for and be available afterwards (see this answer).
This can be accomplished by
\pgfmathsetmacro{\tmpSUM}{0}
\foreach \v/\s in{#3}{
\pgfmathparse{\tmpSUM+\v}
\global\let\tmpSUM\pgfmathresult
}
and then you can use
\pgfmathsetmacro{\deltaA}{\v / \tmpSUM * 360}
I would avoid using the pin option (you have to compute positions anyway!)
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes.geometric, arrows}
\begin{document}
\begin{figure}[h]
\def\angle{0}
\def\radius{2}
\def\labelradius{3}
\def\cyclelist{{"orange","blue","gray","red","green","cyan","magenta"}}
\centering
\newcount\cyclecount \cyclecount=-1
\newcount\ind \ind=-1
\begin{tikzpicture}[nodes = {font=\small}]
\foreach \percent/\name in {
2/3,
2/4,
2/5,
18/7,
13/8,
63/9,
} {
\ifx\percent\empty\else % If \percent is empty, do nothing
\global\advance\cyclecount by 1 % Advance cyclecount
\global\advance\ind by 1 % Advance list index
\ifnum6<\cyclecount % If cyclecount is larger than list
\global\cyclecount=0 % reset cyclecount and
\global\ind=0 % reset list index
\fi
\pgfmathparse{\cyclelist[\the\ind]} % Get color from cycle list
\edef\color{\pgfmathresult} % and store as \color
\draw[fill={\color!50},draw={\color}] (0,0) -- (\angle:\radius)
arc (\angle:\angle+\percent*3.6:\radius) -- cycle;
% \node[pin={[pin distance=1cm]\angle+0.5*\percent*3.6:{\name~[\percent\%]}}]
% at (\angle+0.5*\percent*3.6:\radius) {};
\draw[draw=gray, shorten >=2pt] (\angle+0.5*\percent*3.6:\labelradius) node {\name~[\percent\%]} edge (\angle+0.5*\percent*3.6:\radius);
\pgfmathparse{\angle+\percent*3.6} % Advance angle
\xdef\angle{\pgfmathresult} % and store in \angle
\fi
};
\end{tikzpicture}
\end{figure}
\end{document}
Best Answer
Use the package
pgf-pie, which is now available on CTAN. Usage:Note however that there are conflicts with this package and any other package that introduces the command
\text—e.g.:amstext. In order to mediate these effects editpgf-pie.sty,replacing all occurrences of:\textwith:\textASDF.Use package like: