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