Thread Subject: 3D plotting centres of patches not the vertices

Hi

I am trying to plot a 3D plane with uniform sized patches. I have tried the surf(x,y,z,c) command but it is plotting the x,y,z points I have as the vertices when they actually refer to the centre of the patch. The surf command is ideal apart from this and I was wondering if there was any way I could change it to plot the x,y,z data as the centre of patches or is there another command I could use? Any help would be greatly appreciated!

Thanks