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

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SEPIDEH
SEPIDEH 2015-1-9
回答： bob Esmailpour 2019-6-5
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

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回答（2 个）

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)
bob Esmailpour
bob Esmailpour 2019-6-5
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

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