饼图中颜色列表，切片数量可变

Question

根据论坛上找到的几段代码，我编写了一个简单的代码，用于创建具有可变切片数量的饼图，如下所示。现在，我可以使用第 7 行定义的主色的色调来制作切片的颜色。我正在寻找一种方法来在列表中定义我想要用于每个切片的颜色。类似于：

\def\mycolors{{"red","blue","green","yellow","","",""}}

但我似乎无法找到一种方法来在我的\foreach循环中正确读取这个列表...有没有办法做到这一点？

我的 MWE：

\documentclass{standalone}
\usepackage{tikz}
% couleurs
\definecolor{main}{RGB}{185,30,50}
% 
% paramètres du graphique
\def\theme{main}
\newcommand\shares{{57,40,3,0,0,0,0,0,0,0,0,0,0,0}}%
\def\commentaires{{"très satisfait","satisfait","peu satisfait","","","","","",""}}
\def\titre{niveau de satisfaction}
\def\nbcategories{3}
% 
% code
\begin{document}
   \begin{tikzpicture}%
    \node[black,fill=none] at (0,2.5) {\titre};
    %
    \edef\startangle{0}%
    \draw[\theme!95!black, line width=1pt] (0,0) circle (2.05cm);
    \foreach [
        remember=\endangle as \startangle,
        evaluate=\i as \endangle using {\startangle+(\shares[\i-1]/100*360)},
        evaluate=\halfangle using {(\endangle-\startangle)/2+\startangle},] 
        \i in {1,...,\nbcategories} 
        {%
        \pgfmathsetmacro\intensite{(\nbcategories-\i)/(\nbcategories-1)*100}
        \fill[{\theme!\intensite}] (0,0) --++(\startangle:2cm) arc (\startangle:\endangle:2cm);
        \draw[white, line width=0.25mm](0,0)--++(\startangle:2cm+0.1pt);
    }%
    \draw[white,line width=0.25mm](0,0)--++(\startangle:2cm);%
    \fill[white](0,0)circle [radius=2cm*0.65];%    
    %
    \foreach [
        remember=\endangle as \startangle,
        evaluate=\i as \endangle using {\startangle+(\shares[\i-1]/100*360)},
        evaluate=\halfangle using {(\endangle-\startangle)/2+\startangle},] 
        \i in {1,...,\nbcategories} {%
        \node[\theme!65!black] at (\halfangle:2cm*0.475) {\textbf{\small\pgfmathparse{\shares[\i-1]}\pgfmathresult\%}};
    }%   
    %
    \foreach [] \i in {1,...,\nbcategories} {%
        \pgfmathsetmacro\intensite{(\nbcategories-\i)/(\nbcategories-1)*100}
        \draw[fill={\theme!\intensite},draw=black!65] (-2,-2.25-\i*0.35) -- (-1.75,-2.25-\i*0.35) -- (-1.75,-2.5-\i*0.35) -- (-2,-2.5-\i*0.35) -- cycle;
        \node[right] at (-1.75,-2.375-\i*0.35) {\small \pgfmathparse{\commentaires[\i-1]}\pgfmathresult\phantom{bp}};
    }%
\end{tikzpicture}%
\end{document}

Answer 1

这可能是一个非常低调的解决方案，但对于快速修复来说，您需要的一切都已经存在。只需使用流水号定义颜色，然后使用索引调用，无论如何您都在循环。

以下是可能的颜色定义（完全随机，仅用于原理证明）：

\definecolor{category1}{RGB}{125,135,197}
\definecolor{category2}{RGB}{0,135,197}
\definecolor{category3}{RGB}{125,0,197}
\definecolor{category4}{RGB}{125,135,0}
\definecolor{category5}{RGB}{125,0,0}
\definecolor{category6}{RGB}{0,0,197}
\definecolor{category7}{RGB}{0,135,0}
\definecolor{category8}{RGB}{0,0,0}
\definecolor{category9}{RGB}{255,255,255}

然后将其替换\theme!\intensite为category\i您的索引\i。

完整代码如下：

\documentclass{standalone}
\usepackage{tikz}
% couleurs
\definecolor{main}{RGB}{185,30,50}
% 
% paramètres du graphique
\def\theme{main}
\newcommand\shares{{11,11,11,11,11,11,11,11,11,11,11,11,11,11}}%
\def\commentaires{{"très satisfait","satisfait","peu satisfait","x","y","z","a","b","c"}}
\def\titre{niveau de satisfaction}
\def\nbcategories{9}

\definecolor{category1}{RGB}{125,135,197}
\definecolor{category2}{RGB}{0,135,197}
\definecolor{category3}{RGB}{125,0,197}
\definecolor{category4}{RGB}{125,135,0}
\definecolor{category5}{RGB}{125,0,0}
\definecolor{category6}{RGB}{0,0,197}
\definecolor{category7}{RGB}{0,135,0}
\definecolor{category8}{RGB}{0,0,0}
\definecolor{category9}{RGB}{255,255,255}
% 
% code
\begin{document}
    \begin{tikzpicture}%
        \node[black,fill=none] at (0,2.5) {\titre};
        %
        \edef\startangle{0}%
        \draw[\theme!95!black, line width=1pt] (0,0) circle (2.05cm);
        \foreach [
        remember=\endangle as \startangle,
        evaluate=\i as \endangle using {\startangle+(\shares[\i-1]/100*360)},
        evaluate=\halfangle using {(\endangle-\startangle)/2+\startangle},] 
        \i in {1,...,\nbcategories} 
        {%
            \pgfmathsetmacro\intensite{(\nbcategories-\i)/(\nbcategories-1)*100}
            \fill[{category\i}] (0,0) --++(\startangle:2cm) arc (\startangle:\endangle:2cm);
            \draw[white, line width=0.25mm](0,0)--++(\startangle:2cm+0.1pt);
        }%
        \draw[white,line width=0.25mm](0,0)--++(\startangle:2cm);%
        \fill[white](0,0)circle [radius=2cm*0.65];%    
        %
        \foreach [
        remember=\endangle as \startangle,
        evaluate=\i as \endangle using {\startangle+(\shares[\i-1]/100*360)},
        evaluate=\halfangle using {(\endangle-\startangle)/2+\startangle},] 
        \i in {1,...,\nbcategories} {%
            \node[\theme!65!black] at (\halfangle:2cm*0.475) {\textbf{\footnotesize\pgfmathparse{\shares[\i-1]}\pgfmathresult\%}};
        }%   
        %
        \foreach [] \i in {1,...,\nbcategories} {%
            \pgfmathsetmacro\intensite{(\nbcategories-\i)/(\nbcategories-1)*100}
            \draw[fill={category\i},draw=black!65] (-2,-2.25-\i*0.35) -- (-1.75,-2.25-\i*0.35) -- (-1.75,-2.5-\i*0.35) -- (-2,-2.5-\i*0.35) -- cycle;
            \node[right] at (-1.75,-2.375-\i*0.35) {\small \pgfmathparse{\commentaires[\i-1]}\pgfmathresult\phantom{bp}};
        }%
    \end{tikzpicture}%
\end{document}

当然，您可以使用库提供的颜色colorbrewer，然后尝试循环索引和给定的字母颜色索引，但这需要对代码进行更复杂的更改。

Answer 2

这轮图我写的包，可以使用。

切片之间的间隙是通过键获得的gap。

百分比由 给出inner data=\WCperc。

图例由键决定legend。这是一个tabular放置在 中的\node。行由键决定legend row。可以使用 获得所有行的结果\WClegend。

该宏\WClistcolors引用了给予键的列表中的项目WClistcolors。

\documentclass[border=6pt]{standalone}
\usepackage{wheelchart}
\usepackage{siunitx}
\begin{document}
\begin{tikzpicture}
\wheelchart[
  counterclockwise,
  data=,
  gap=0.03,
  inner data=\WCperc,
  inner data sep=0.3,
  legend row={\tikz\fill[\WClistcolors,draw=black] (0,0) rectangle (0.3,0.3); & \WCvarB},
  legend={
    \node[anchor=north] at (0,-3.5) {%
      \begin{tabular}{l@{ }l}%
      \WClegend%
      \end{tabular}%
    };
  },
  slices style=\WClistcolors,
  start angle=0,
  title=niveau de satisfaction,
  WClistcolors={green,orange,red}
]{%
  57/très satisfait,
  40/satisfait,
  3/peu satisfait%
}
\end{tikzpicture}
\end{document}