2D matrix to 3D cylinder

Hello,

could anyone advise me how to make a cylinder from 2D matrix of a number of rows and columns eg x = rand(5,10). And then interpolate values around its perimeter and display it?

Best regards

Answer 1

[Matt J]

If you have the Image Processing Toolbox, you would use the warp command, e.g.,

[X,Y,Z] = cylinder(ones(1,5),100);
warp(X,Y,Z,rand(5,10));

[martin martin]

It works perfectly, but now I have one more question. How can I change colorbar from B/W to colored (typically RGB) ?

clc; clear all; close all;
[X,Y,Z] = cylinder(ones(1,5),100);
M = round(rand(5,10)*100);
figure
warp(X,Y,Z,M)
colorbar
caxis([0 100]) % rozmezi colorbaru
grid on

This code produce:

And I want something like this (imagesc) around the cylinder. Exist some function?

[Matt J]

In the documentation for warp, you will see that it has options for providing a colormap or giving RGB data instead of grayscale.

[Benjamin Kraus]

Can't you just call colormap and specify the desired colormap?

colormap(jet)

[martin martin]

Ben, thank you.