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48 lines
1.3 KiB
TeX
48 lines
1.3 KiB
TeX
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\documentclass[varwidth=true, border=2pt]{standalone}
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\usepackage[usenames,dvipsnames]{xcolor}
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\usepackage{pgfplots}
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\pgfplotsset{compat=1.11}
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\usepackage{tikz}
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\begin{document}
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\pgfplotsset{
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colormap={whitered}{
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color(0.000cm)=(blue!50!black);
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color(0.125cm)=(blue);
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color(0.250cm)=(SkyBlue);
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color(0.375cm)=(SkyBlue);
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color(0.500cm)=(SpringGreen);
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color(0.625cm)=(yellow);
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color(0.750cm)=(yellow);
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color(0.875cm)=(red);
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color(1.000cm)=(red!50!black)
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}
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}
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\begin{tikzpicture}
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\begin{axis}[
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domain=-2:2,
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view={0}{90},
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axis background/.style={fill=white},
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]
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\addplot3[surf,
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samples=50,
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shader=interp,
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colormap name=whitered]
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{x/exp(x^2+y^2)};
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% \addplot3[contour gnuplot={number=15, labels=false},
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% very thick,
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% samples=30]
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% {x/exp(x^2+y^2)};
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\addplot3[blue,
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quiver={
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u={(1-2*x^2)*exp(-x^2-y^2)},
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v={-2*x*y*exp(-x^2-y^2)},
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scale arrows=0.3,
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},
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-stealth,samples=15]
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{x/exp(x^2+y^2)};
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\end{axis}
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\end{tikzpicture}
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\end{document}
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