Trouble plotting a surface from N^2 3D vectors

I am in need of a bit of assistance with surface plotting. N^2 3D vectors in an 3xNxN array, M.

where M( 1 , : , : ) are my X coordinates

M( 2 , : , : ) are my Y coordinates

and M( 3 , : , : ) are my Z coordinate.

I thought I could simply say

surf(X,Y,Z)

But that returns the error Z must be a matrix, not a vector or a scalar

I don't understand this as Z is a matrix, yes?

Answer 1

[Walter Roberson]

X = squeeze(M(1,:,:));
Y = squeeze(M(2,:,:));
Z = squeeze(M(3,:,:));
surf(X,Y,Z)