[Octave-bug-tracker] [bug #51145] convn: incompatible results on empty inputs

[Carnë Draug]

Update of bug #51145 (project octave):

                 Summary: conv2 and filter2: incompatible results on empty
inputs => convn: incompatible results on empty inputs

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Follow-up Comment #1:

I think this is a Matlab bug.  Even if the output ought to be of size
"size(A)+size(B)-1" then it should return something of size [4 4], and not [5
5].  We can have Octave return that [4 4] by simply removing those checks on
oct-conv.cc
http://hg.savannah.gnu.org/hgweb/octave/file/0e4ceda8fbcf/liboctave/numeric/oct-convn.cc#l135

But I am still unsure. If the point of full convolution is to include even
elements affected by padding, since there was no convolution done at all, the
return should be empty?

I am removing the filter2 part of the bug title, since that behaviour is
inherited from the conv functions.

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