[Octave-bug-tracker] [bug #37390] In matlab repmat can have empty inputs

[Richard]

Follow-up Comment #2, bug #37390 (project octave):

I realised I made a mistake when I first reported this. 

Repmat does not replace empty values with 1, it ignores them and treats the
non-empty values as if they were the first argument:

>> repmat([1,2,3], [], 4)

ans =

     1.0000e+000     2.0000e+000     3.0000e+000
     1.0000e+000     2.0000e+000     3.0000e+000
     1.0000e+000     2.0000e+000     3.0000e+000
     1.0000e+000     2.0000e+000     3.0000e+000

>> repmat([1,2,3], 4, [])

ans =

     1.0000e+000     2.0000e+000     3.0000e+000
     1.0000e+000     2.0000e+000     3.0000e+000
     1.0000e+000     2.0000e+000     3.0000e+000
     1.0000e+000     2.0000e+000     3.0000e+000

so your patch is not quite right. Something like the following might work:

# check second arg first so it will be one if both 
# m and n are empty
if (isempty (n))
    n = 1;
endif
if (isempty (m))
    m = n;
    n = 1;
endif

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