How to give different color to each pie?

Question

I've gone through the answer in Package for pie charts.

Can you please suggest, how to give different color for each pie?

Answer 1

\documentclass{article}

\usepackage{calc}
\usepackage{ifthen}
\usepackage{tikz}
\begin{document}
\newcommand{\slice}[5]{ %% use 5 arguments here
  \pgfmathparse{0.5*#1+0.5*#2}
  \let\midangle\pgfmathresult

  % slice %% I changed !10 to !30 to get darker color
  % use the fifth argument #5 to pass the color  
  \draw[thick,fill=#5!30] (0,0) -- (#1:1) arc (#1:#2:1) -- cycle;

  % outer label
  \node[label=\midangle:#4] at (\midangle:1) {};

  % inner label
  \pgfmathparse{min((#2-#1-10)/110*(-0.3),0)}
  \let\temp\pgfmathresult
  \pgfmathparse{max(\temp,-0.5) + 0.8}
  \let\innerpos\pgfmathresult
  \node at (\midangle:\innerpos) {#3};
}

\begin{tikzpicture}[scale=3]

\newcounter{a}
\newcounter{b}
%% -------------- use the new variable \c to pass the color
\foreach \p/\t/\c in {20/type A/red, 4/type B/blue, 11/type C/red,
                   49/type D/green, 16/other/yellow}
  {
    \setcounter{a}{\value{b}}
    \addtocounter{b}{\p}
    \slice{\thea/100*360}
          {\theb/100*360}
          {\p\%}{\t}{\c}  %% here we use the fifth variable
  }

\end{tikzpicture}

\end{document}

Answer 2

Just for fun with PSTricks.

\documentclass[pstricks,border=12pt,10pt]{standalone}
\SpecialCoor

\newcounter{sum}
\addtocounter{sum}{0}

\psset{fillstyle=solid,opacity=.5,linejoin=1}
\degrees[100]

\newcommand\Item[3][red]{%
    \pstVerb{/IA \thesum\space def /FA IA #2 add def}%
    \pswedge[fillcolor=#1]{3}{!IA}{!FA}%
    \uput{1.5}[!IA FA add 2 div](0,0){\scriptsize #2\%}%
    \uput{3.2}[!IA FA add 2 div](0,0){#3}%
    \addtocounter{sum}{#2}%
    \ignorespaces
}

\begin{document}
\begin{pspicture}(-4,-4)(4,4)
\Item{20}{type A}
\Item[blue]{4}{type B}
\Item{11}{type C}
\Item[green]{49}{type D}
\Item[yellow]{\the\numexpr100-\thesum\relax}{other}
\end{pspicture}
\end{document}

Answer 3

with chartColor=color you'll get the predefined colors instead of the user defined.

\documentclass[pstricks,border=12pt]{standalone}
\usepackage{pstricks-add}

\begin{document}
 \psset{unit=1.5}
 \begin{pspicture}(-3,-3)(3,3)
 \psChart[userColor={red!40,green!50,blue!40,gray,cyan!50,
 magenta!80,cyan},chartSep=30pt,shadow=true,shadowsize=5pt
]{20,4,11,49,16}{3}{2}
 \psset{nodesepA=5pt,nodesepB=-10pt}
 \ncline{psChartO1}{psChart1}\nput{0}{psChartO1}{20\%}
 \ncline{psChartO2}{psChart2}\nput{150}{psChartO2}{4\%}
 \ncline{psChartO3}{psChart3}\nput{90}{psChartO3}{11\%}
 \ncline{psChartO4}{psChart4}\nput{-90}{psChartO4}{49\%}
 \ncline{psChartO5}{psChart5}\nput{0}{psChartO5}{16\%}
 \bfseries%
 \rput(psChartI1){type A}\rput[b](psChartI2){type B}
 \rput[t](psChartI3){type C}
 \rput(psChartI4){type D}\rput(psChartI5){other}
 \end{pspicture}
\end{document}