STL file from 3D array

2018 12 13
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更新时间：2025 7 15
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Hi everyone,
I've got a 3D array which is a product of 3 matrices ( svds function is used 3DARRAY= U*E*V' ). Now, I need to convert that array into a somewhow CAD or Mesh readable file (like a surface). The best file I can think of STL but I couldnt find a way to convert. Any thoughts?
Best,
Oguzhan

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madhan ravi
madhan ravi 2018-12-13

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Oguzhan M
Oguzhan M 2018-12-14
Thanks for the answer, but this method, I think, is only for coloumn vectors, which are basically xy or xyz coordinates. In my case, since svds is applied, the array consists of many rows and coloumns (gridded xy and corresponding z which looks sth like 880x1440).
Thanks,
Oguzhan
DGM
DGM 2025-7-15
编辑：DGM 2025-7-15
If the data can be plotted with surf(), you can either use surf2stl() from the FEX, or you can use surf(), surf2patch(), and stlwrite(). The first part of this example shows both ways:
https://www.mathworks.com/matlabcentral/answers/1966474-how-to-export-matlab-fsurf-into-stl-file-please

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Oguzhan M
Oguzhan M
2018-12-13

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DGM
DGM
2025-7-15

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