[Octave-bug-tracker] [bug #65551] array size extension fails for sparse variables

[Andy Adler]

URL:
  <https://savannah.gnu.org/bugs/?65551>

                 Summary: array size extension fails for sparse variables
                   Group: GNU Octave
               Submitter: andy_adler
               Submitted: Wed 03 Apr 2024 12:34:33 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: Andy Adler
        Originator Email: 
             Open/Closed: Open
                 Release: 9.1.0
         Discussion Lock: Any
        Operating System: Any
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Wed 03 Apr 2024 12:34:33 PM UTC By: Andy Adler <andy_adler>
Recent versions of octave support auto-array size for operators:
e.g [ones(3) .* (1:3), ones(3) + (1:3) ]

But this fails for sparse values
octave:1> sparse(ones(3)) .* (1:3)
error: product: nonconformant arguments (op1 is 3x3, op2 is 1x3)

octave:2> times(sparse(ones(3)) , (1:3) )
error: product: nonconformant arguments (op1 is 3x3, op2 is 1x3)

bsxfun works in this case
octave:3> bsxfun(@times, sparse(ones(3)), (1:3))


In matlab these functions succeed:
>> issparse(  sparse(ones(3)) .* (1:3) )
ans =   logical    1

>> issparse(  sparse(ones(3)) + (1:3) ) 
ans =   logical    0












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