how to plot a 2D matrix to a 3D graph

given a 2D matrix of size( x * y ) where each element contains a numeric value Z , how to plot the Z value in a 3D graph as a function of both x and y such that Z = matrix(x,y) ?

I have tried using meshgrid to create a 2D array of size(x,y) and defined a new function F = matrix(x,y) and finally used surf(x,y,F) to plot the data but it gave me an empty graph.

[John Chilleri]

If you look into the surf command, you see that given three matrices:

surf(X, Y, Z)

The corresponding elements of X, Y, Z represent the x location, y location, and Z value, respectively, so you would need a 120x160 X, and a 120x160 Y matrix with your desired locations corresponding to your Z values.

Furthermore, the connections are made to the 4 nearest neighbors, which is in a matrix sense, the elements directly above, below, and beside each element.

[raed khader]

thanks, it works

[John Chilleri]

Good to hear!

[Amit Kumar]

Dear John,

what is 120x160 X matrix. I have the same problem. For eg. I have a matrix

2 3 2.5 5 7 6

4 8 5.6 7 8 9

8 9 4.7 4 2 8

All these value are of Z. then what should be X and Y matrix