Hello everybody,

I want to make a Fermisurface plot (isosurface plot) with octave.

I use the following commands:

the first one to insert the attached file,

*>> M=load ("-ascii", "FERMISURF.OUT")*

*>> isosurface (M(1:end,1), M(1:end,2), M(1:end,3), M(1:end,4), 0.0);*

*M(1:end,1), M(1:end,2), M(1:end,3)* are indicating the first 3 columns, i.e. the x,y,z coordinates, *M(1:end,4)* indicates the value at the x,y,z coordinate and *0.0* is the isovalue.

I already checked the output of M(1:100,1), I think it should be fine.

But I get the following errors which I don't understand at all:

**error: isosurface: V must be a non-singleton 3-dimensional matrix**

**error: called from**

** isosurface>__get_check_isosurface_args__ at line 307 column 5**

** isosurface at line 152 column 42**

Do you have any suggestions?

Thank you in advance!

Best regards,

Arthur Niedermayr

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