[Octave-bug-tracker] [bug #41512] Take max of sparse logical matrix

[David Spies]

URL:
  <http://savannah.gnu.org/bugs/?41512>

                 Summary: Take max of sparse logical matrix
                 Project: GNU Octave
            Submitted by: dspyz
            Submitted on: Sat 08 Feb 2014 06:34:56 PM GMT
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

Looking at the second return value of max(a,[],2) is a way to find the index
of the first true element in each row of a.

matlab supports this when a is sparse logical, but octave gives an error:

octave:7> [i,j] = max(logical(speye(3)),[],2);
error: octave_base_value::int8_array_value(): wrong type argument 'sparse bool
matrix'

Of course you can always just convert the argument to double




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