This might be a hard to explain question; I have an intensity array that I use to get a surf(Z) of a hemisphere. Is there a way to get the equivalent x and y arrays of these intensities, ie, if I were to surf(x,y,z) of these 3 I would get the same result? Maybe a different way of asking would be, can I split surf(Z) into surf(x,y,z) and get the same result. Because I need to have these x and y arrays also to compare my hemisphere to a matlab generated sphere. Thanks.