concentric ring/donut charts

Question

I was checking this question and this other one, and I was wondering if somebody has a solution to create concentric ring/donut charts

I want to accomplish something like this:

Or more in particular something like this:

Because I want to use it for languages and would like to be able to write "汉语" for Chinese...

Does anybody know of a proper way to do it? Many thanks!

Answer 1

Disregarding the recommendations to not use this kind of diagram, it's fairly straightforward to draw those kinds of things, just a matter of drawing some arcs. I didn't try matching the colors, or making any sort of nice interface.

\documentclass[border=5mm]{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\foreach [count=\i] \total/\clr in {80/blue,60/red,45/green,25/cyan}
   \draw [line width=2mm,\clr]
     (0.5cm+\i*3mm,0)
     node[above,inner sep=0pt,black,font=\scriptsize]{\total}
     arc[start angle=0,radius=0.5cm+\i*3mm,delta angle=-3.60*\total];
\matrix [every node/.style={right=1.5mm,black,font=\small}] at (2,2) {
   \fill[blue] circle[radius=2mm] node  {Iceland}; \\
   \fill[red] circle[radius=2mm] node  {Switzerland}; \\
   \fill[green] circle[radius=2mm] node  {USA}; \\
   \fill[cyan] circle[radius=2mm] node  {Turkey}; \\
};
\end{tikzpicture}

\begin{tikzpicture}
\foreach [count=\i] \total/\clr in {10/cyan,20/green,30/red,50/blue}
   \draw [line width=2mm,\clr]
     (-0.5cm-\i*2.5mm,0)
%     node[above,inner sep=0pt,black,font=\scriptsize]{\total}
     arc[start angle=180,radius=0.5cm+\i*2.5mm,delta angle=3.60*\total];

\begin{scope}[every node/.style={above,anchor=south west,inner sep=0.5pt,xshift=-2mm,font=\scriptsize}]
\node [cyan] (I) at (0,0.2) {Italian};
\node [green] (F) at (I.north west) {French};
\node [red] (E) at (F.north west) {English};
\node [blue] (H) at (E.north west) {Hungarian};
\end{scope}
\end{tikzpicture}
\end{document}

Answer 2

The wheelchart package, which I wrote, can be used.

Each ring is placed in a separate \wheelchart.

The value (used in the key total angle) and the color (used in the key slices style) are defined in the \foreach loop. The counter \n of this loop is used in the key radius which sets the inner radius to 1+\n and the outer radius to 2+\n. Hereafter, these radii are modified with the key gap radius to create the gap between the rings.

\documentclass[border=6pt,dvipsnames]{standalone}
\usepackage{wheelchart}
\begin{document}
\begin{tikzpicture}
\foreach\WCvalue/\WCcolor [count=\n] in {80/Yellow,60/Green,40/Blue,25/Red}{
\wheelchart[
  data=,
  gap radius=0.1,
  radius={1+\n}{2+\n},
  slices style=\WCcolor,
  start angle=0,
  total angle={\WCvalue*3.6}
]{1}
\node[above] at ({1.5+\n},0) {$\WCvalue$};
}
\end{tikzpicture}
\end{document}