Use step size in surf and imagesc

I imported a 20 x 20 matrix from a matlab. I used that matrix to plot surface map and image map using surf() and imagesc() as shown below:

figure;
surf(mmx1,'EdgeColor','None', 'facecolor', 'interp');
view(2);
axis equal;
figure;
imagesc(mmx1); 
colormap jet;

Although the size of matrix is 20 x 20, the step size is 0.5 mm and hence in the surface and image maps, the X and Y axis should be 10 mm x 10 mm.

Can you please help me to define this step size so that I'd get an image with 10 mm in both X- and Y-axes? Thank you for your help.

Answer 1

[Mike Garrity]

You need to make up XData & YData arrays with the right values and pass them into surf & imagesc. Something like this:

x = linspace(0,10,size(mmx1,2));
y = linspace(0,10,size(mmx1,1));
surf(x,y,mmx1,'EdgeColor','none','FaceColor','interp')

imagesc(x,y,mmx1)