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\documentclass{standalone}
\usepackage{tikz}
\begin{document}

\begin{tikzpicture}
\fill [white] (-1,-0.) rectangle (4.7, 5.7);
\fill [fill=red!90!black] (0,0) to [out=120, in=250] (-0.2,4.2) -- (-0.5,5) -- (-0.3,5.2) -- (1.8,4.5) -- (3.7,5.2) to [out=-70, in=70] (3.9,0) -- (3.2,0.5) to [out=200, in=-20] (0.6,0.5) -- cycle;
\draw [cyan!80, fill=white, line width=8pt] (0.75,3.65) circle [radius=1.3];
\draw [cyan!80, fill=white, line width=8pt] (3.25,3.7) circle [radius=1];

\fill [black] (1.05,3.5) circle [radius=0.45];
\fill [black] (2.9,3.65) circle [radius=0.3];

\fill [white] (1.25,3.5) circle [radius=0.15];
\fill [white] (3.05,3.6) circle [radius=0.12];

\fill [yellow!80!orange] (1.85,3.2) -- (2.35,3.2) -- (2.1,2.6) -- cycle;
\end{tikzpicture}
\end{document}

2d
answered Scatterplot with marginal histograms using pgfplots
2d
awarded  Enlightened
2d
awarded  Nice Answer
Jul
24
awarded  Enlightened
Jul
24
awarded  Nice Answer
Jul
20
awarded  Popular Question
Jul
16
comment Barplot: alternating colors, bars side by side
Ah, yes! I thought the ifthen package provided the \ifodd command. Silly.
Jul
16
revised Drawing circular paths in random locations (TikZ)
added 2 characters in body
Jul
16
revised Drawing circular paths in random locations (TikZ)
added 58 characters in body
Jul
16
answered Drawing circular paths in random locations (TikZ)
Jul
16
comment Drawing circular paths in random locations (TikZ)
Instead of \fill [blue!20] (0,0) -- (1,0) -- (1,0.5) -- (0,0.5) -- cycle;, you can use \fill [blue!20] (0,0) rectangle (1,0.5);.
Jul
16
comment Drawing circular paths in random locations (TikZ)
May they overlap?
Jul
16
answered Barplot: alternating colors, bars side by side
Jul
15
answered Sharp-symbol offset and text left-justification problem with tikz
Jul
15
comment Beginner: Drawing using Tikz
@Jesse: Or, equivalently, \draw[dashed, bend right] (-1,0) to (0,1) to (1,0) to (0,-1) to (-1,0);
Jul
15
comment How to mark/label nth data point from file in pgfplots?
@Hotschke: Quite obviously the more compact "user side" code. The "setup" is limited to the one \pgfplotsset block.
Jul
15
comment How to mark/label nth data point from file in pgfplots?
@Hotschke: It is. See the edit.
Jul
15
revised How to mark/label nth data point from file in pgfplots?
added 1410 characters in body
Jul
15
comment How to mark/label nth data point from file in pgfplots?
@Hotschke: I've edited my answer.
Jul
15
revised How to mark/label nth data point from file in pgfplots?
added 1701 characters in body