[Octave-bug-tracker] [bug #42422] ismatrix: Matlab is only true for 2 dimensions

[Rik]

Follow-up Comment #4, bug #42422 (project octave):

We should also verify with a recent version of Matlab what the true behavior
of all these commands are.  The documentation now makes isscalar, isrow,
iscolumn, isvector, ismatrix suggest that they are only concerned with the
return value from size().  ismatrix() on Octave, however, also checks that the
array is numeric.  Finally, ismatrix is implemented in C++ while the others
are in m-files.  This is really a simple function and should probably be made
an m-file.

Some tests for a recent version of Matlab:


ismatrix ({1,2;3,4})
[x(1:2,1:2).a] = deal (1,1,1,1);
ismatrix (x)
ismatrix ([])
ismatrix (zeros (10, 0))
ismatrix (zeros (0,10))
x = zeros (0,10,0,0,0)
size (x)
ndims (x)
ismatrix (x)
isscalar ({1})
isvector ([])
isvector (1)
isvector (zeros (1,0))
isvector (cell (1,3))



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