How to use different colormaps for different function in mesh plot.

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U B
U B 2024-9-5
编辑： Voss 2024-9-5
Ran in:
Using different colormaps for same axis is not logical but if I want want to somehow do it then what should I do?
x = linspace(-3,3,100); y = linspace(0,3,100);
[X,Y] = meshgrid(x,y);
Rho2 = X.*X + Y.*Y;
Z = exp(-Rho2);
Z1 = sin(sqrt(Rho2));
figure,
mesh(X,Y,Z,'FaceAlpha',1); hold on
mesh(X,Y,Z1,'FaceAlpha',1);
I'm using R2021a and freezColors function is not suporting, it shows error. Perhaps I'm using it wrong. Anybody has any idea how to do it?
Appriciate your help.

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Voss
Voss 2024-9-5
编辑：Voss 2024-9-5
Ran in:
Here is one way:
% data
x = linspace(-3,3,100); y = linspace(0,3,100);
[X,Y] = meshgrid(x,y);
Rho2 = X.*X + Y.*Y;
Z = exp(-Rho2);
Z1 = sin(sqrt(Rho2));
% pick some colormaps
cmap = parula();
cmap1 = turbo();
% convert Z and Z1 into colors based on their respective colormaps
C = ind2rgb(round(rescale(Z,1,size(cmap,1))),cmap);
C1 = ind2rgb(round(rescale(Z1,1,size(cmap1,1))),cmap1);
% plot the meshes
figure
mesh(X,Y,Z,C,'FaceAlpha',1); hold on
mesh(X,Y,Z1,C1,'FaceAlpha',1);
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U B
U B 2024-9-5
Sorry to disturb you again but can I use the same method in contour plot also?
lets say for -
contourf(X,Y,Z,70,'edgecolor','none') ; hold on
contourf(X,Y,Z1,70,'edgecolor','none'); hold off
Voss
Voss 2024-9-5
编辑：Voss 2024-9-5
No, I don't think so.
The options listed here for countour plots
https://www.mathworks.com/help/matlab/ref/matlab.graphics.chart.primitive.contour-properties.html
basically boil down to 1) a constant color everywhere, or 2) using the current colormap. Since an axes can have only one colormap, you'd have to use the same colormap for all contour plots in a given axes. There doesn't appear to be a way to specify an array of RGB colors for a contour like you can for a surface/mesh.

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