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# Untitled

a guest Mar 20th, 2019 46 Never
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1. documentclass{standalone}
2. usepackage{tikz,pgfplots}
3. usepgfplotslibrary{patchplots}
4. pgfplotsset{%
5.     colormap={whitered}{color(0cm)=(transparent); color(1.cm)=(red)}%
6. }
7. begin{document}
8. begin{tikzpicture}[baseline,
9.     declare function={bivar(ma,sa,mb,sb)=
10.         1/(2*pi*sa*sb) * exp(-((x-ma)^2/sa^2 + (y-mb)^2/sb^2))/2;}]
11. % Outer coordinate system
12. begin{axis}[
13.     unit vector ratio*=1 1 1,
14.     axis lines = middle,
15.     view={120}{30},
16.     domain = -10:10,
17.     zmin = -5, zmax = 5,
18.     ]
19.     coordinate (origin1) at (axis cs:0,-10,0);
20.     coordinate (origin2) at (axis cs:0,10,0);
21.     addplot3[no markers,opacity=0]{0}; % <- without this pseudo plot, the outer coordinate system does not work
22. end{axis}
23. % Bivariate distribution 1
24. begin{axis}[
25.     at={(origin1)}, anchor={center},
26.     width=3cm, height=3cm,
27.     scale only axis,
28.     axis equal image,
29.     hide axis,
30.     colormap name=whitered,
31.     view={0}{90},
32.     enlargelimits=false,
33.     domain=-1.5:1.5, y domain=-1.5:1.5,
34.     ]
36. end{axis}
37. % Bivariate distribution 2
38. begin{axis}[
39.     at={(origin2)}, anchor={center},
40.     width=3cm, height=3cm,
41.     scale only axis,
42.     axis equal image,
43.     hide axis,
44.     colormap name=whitered,
45.     view={0}{90},
46.     enlargelimits=false,
47.     domain=-1.5:1.5, y domain=-1.5:1.5,
48.     ]