Matlab: Using imshow and mesh in the same plot

[kellis_115]

Hi,
I have written a piece of code to plot a greyscale image using imshow and a mesh plot using mesh in the same plot (the graphs are subplots in the smae figure. My problem is that when I use imshow the meshplot turns to greyscale rather than colour, and I can't worj out how to have one plot as greyscale and the other as colour.

My code is below if this helps;

%Script to show diffraction grating
clear all

M=dlmread('testslit5.txt','\t');

subplot(2,1,1),imshow(M);
title('Diffraction grating');

Mtransform=fft2(M);
Mtransform=fftshift(Mtransform);
N=max(max(Mtransform));
Mtransform=Mtransform/N;

subplot(2,2,3),mesh(abs(Mtransform));
title('Diffraction grating diffraction pattern (intensity)');
subplot(2,2,4),mesh(angle(Mtransform));
title('Diffraction grating diffraction pattern (phase)');

Thanks in advance

 

[NateD]

.You can use the 'colormap' function to set a different color map for each plot. For example, to set the colormap for the mesh plot to be 'jet' and the colormap for the imshow plot to be 'gray', you could do the following:subplot(2,1,1),imshow(M, 'colormap', gray);title('Diffraction grating');Mtransform=fft2(M);Mtransform=fftshift(Mtransform);N=max(max(Mtransform));Mtransform=Mtransform/N;subplot(2,2,3),mesh(abs(Mtransform), 'colormap', jet);title('Diffraction grating diffraction pattern (intensity)');subplot(2,2,4),mesh(angle(Mtransform), 'colormap', jet);title('Diffraction grating diffraction pattern (phase)');