Hi,

From what I could understand, you want to create a graph similar to the one attached.

If so you can use the following functions:

-Surf(x,y,z)

-Mesh(x,y,z)

-And their variants e.g. meshc(x,y,z)

Please note that variable z should be a matrix, with a number of lines equal to the number of elements of x, and with a number of columns equal to the number of elements of y.

Hope I helped.

BR