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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 Disable automatic subticks on semilogyaxis plot with pgfplots
Nov
24
awarded  Good Answer
Nov
24
awarded  Famous Question
Nov
21
comment Labeling only one tick mark but having other tick marks on x-axis
Ah, I see what you meant now. Set tick={5,10,...,25}, xticklabels={}, extra x ticks={2}, extra x tick style={xticklabel=\pgfmathprintnumber{\tick}}
Nov
21
comment Labeling only one tick mark but having other tick marks on x-axis
Isn't that what you wanted? Could you include an image of what you want the final result to look like?
Nov
20
awarded  Enlightened
Nov
20
comment Labeling only one tick mark but having other tick marks on x-axis
Then set xtick={5,...,25}, xticklabels={}, extra x ticks={2}.
Nov
20
awarded  Nice Answer
Nov
20
comment Labeling only one tick mark but having other tick marks on x-axis
Set xtick={5,10,...,25}, extra x ticks={2}.
Nov
19
comment pgfplots very small Y values
@MathiasB: No worries! Good luck =)
Nov
19
comment pgfplots very small Y values
@MathiasB: Do you have gnuplot installed on your system? Do you enable shell escape when compiling your .tex file (like the error message says, using pdflatex -shell-escape <filename>)?
Nov
19
answered pgfplots very small Y values
Nov
18
comment PDF for the hypergeometric distribution
@Toño: I'm not sure I understand correctly: Are you plotting hypergeompmf(52,16,10,4)? In that case you're getting what looks like a uniform distribution because you're just plotting a fixed value (you might as well just say \addplot {0.224};). To get a more meaningful, you need to have an independent variable, i.e. x. Try \addplot {hypergeompmf(52,16,10,x)};, for instance.
Nov
15
awarded  Enlightened
Nov
15
awarded  Nice Answer
Nov
14
comment How can I the draw the curve $f(x)=x^n$?
This site is about the TeX family of typesetting systems. Other software (like Geogebra) is not on topic for this site. Perhaps this question is better suited for superuser.com?
Nov
11
awarded  Good Answer
Nov
10
comment Align equations on equal (=) symbol
Please don't downvote below -1. A score of -1 is enough to show that the question needs work. On this site, multiple negative votes are typically reserved for vandalism or spam posts. Please give the poster a chance to revise their question by leaving helpful comments like barbara or Werner did, and not just piling on downvotes within an hour of the question being posted. Also, remember to come back and revert your downvote once the question is improved.
Nov
10
comment Add circle to Smith chart using PGF
Do you need the circle for highlighting a particular point, or is the size of the circle meaningful in terms of the axis units?
Nov
7
awarded  Enlightened