surf plot- Z must be a matrix, not a scalar or vector.

Hi all,

I have an excel file with three columns as x,y and z. I want to do "surf" plot I write the mesh grid command , but after writing surf, I am confronting with this error: using surf, Z must be a matrix, not a scalar or vector.

Could you kindly tell me where is the problem?

Thanks in advance for the help Sepideh

Answer 1

[Alessandro Masullo]

The surf function requires the z values to be a matrix. If you have column data you can use trisurf, instead:

   tri = delaunay(x,y);
   trisurf(tri,x,y,z)

Answer 2

[bob Esmailpour]

I found another problem with triSurf. After couple a minute my Matlab was closed without any error. I tried many times but results were same. I have Corei7 PC desktop with 16GB Ram and the size of each matrix is 9197337