5

I would like to make in LaTeX these circles.enter image description here

How can we add the words in them? The color for the big one?

  • Please add a minimal working example (MWE) that illustrates your problem. It will be much easier for us to reproduce your situation and find out what the issue is when we see compilable code, starting with \documentclass{...} and ending with \end{document}. – user13907 May 18 '13 at 14:07
  • 1
    They aren't circles. – Nicholas Hamilton May 18 '13 at 15:04
7

You tagged , so here goes.

The shadings library is used to shade the ring similar to your image. The even odd rule makes it possible to use another circle to not-fill the inner part.

As both circular paths use different line option (one is blue-ish, the other is one black) we cannot use the same \path (implicitly called by \shade) but use two separate \draw commands. For maintainability reasons the path is saved as an insert path style so that one can use it again without repeating all values.

The decorations.text library is used to place the text along arc paths.

A node is placed on the outer circle by

\node[dot] at (30:2.5cm and 1.75cm) {};

Sadly, one cannot place a node on a circle path. There does not even exist a timer. (I think, recent CVS version of PGF allow it to place nodes along an arc.)

Code

\documentclass[tikz]{standalone}
\usetikzlibrary{decorations.text,shadings}
\tikzset{
  saveuse path/.code 2 args={
    \pgfkeysalso{#1/.estyle={insert path={#2}}}%
    \global\expandafter\let\csname pgfk@\pgfkeyscurrentpath/.@cmd\expandafter\endcsname % not optimal as it is now global through out the document
                           \csname pgfk@\pgfkeyscurrentpath/.@cmd\endcsname
    \pgfkeysalso{#1}%
  }
}
\begin{document}
\begin{tikzpicture}[even odd rule,dot/.style={shape=circle,fill=green,draw}]
 \shade[top color=white, bottom color=blue!40] [saveuse path={big circle}  {(0,0) circle [x radius=2.5cm, y radius=1.75cm]}]
                                               [saveuse path={small circle}{(0,0) circle [x radius=1.5cm, y radius=1.0cm]}];

 \draw          [small circle];
 \draw[blue!40] [big circle];

 \node[dot] at (30:2.5cm and 1.75cm) {};
 \path [
   decoration={
     name=text along path,
     text={|\bfseries\sffamily|Productivity||},
     reverse path,
     text align={align=center},
   },
   decorate
 ] (60:2.0cm and 1.4cm) arc [x radius=2.0cm, y radius=1.0cm, start angle=60, end angle=120];

 \path [
   decoration={
     name=text along path,
     text={Efficiency},
     text align={align=center},
   },
   decorate
 ] (-140:1.3cm and .8cm) arc [x radius=1.3cm, y radius=0.5cm, start angle=-140, end angle=-40];
\end{tikzpicture}
\end{document}

Output

enter image description here

  • Thank you very much, but I would like to ask, if the grid could be erased? – Y_gr May 18 '13 at 15:06
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    @giannis Yes, of course. Just remove the backgrounds library and the gridded option from the TikZ picture. – Qrrbrbirlbel May 18 '13 at 15:22
  • Also, how could we add a point in the Big circle? – Y_gr May 18 '13 at 15:45
  • @giannis What do you mean? The big circle’s coordinate are accessible with (<angle>:2.5cm and 1.75cm). You can place anything you want on it. – Qrrbrbirlbel May 18 '13 at 17:36
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    @giannis That doesn’t look right. The x radius and y radius option do not have anything to do with the node and you’re missing at least the {} of the node. I wouldn’t include the node in the saveuse path either because it would be repeated for the \draw part. Let me update the answer with some ideas. – Qrrbrbirlbel May 18 '13 at 19:43

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