3-D surface plot with an array

Dear all, I have a matrix A=[n,3] which

A(n,1) is the x-coordinate, 
A(n,2) is the y-coordinate, 
A(n,3) is the magnitude.

I want to plot a surface but the command 'surf' requires A(n,3) is a matrix of size of A(n,1) and A(n,2) Could you please help. Thanks

Answer 1

[Walter Roberson]

See scatteredInterpolant

[Shan Chu]

Thanks.I did it :D