[Octave-bug-tracker] [bug #63277] isfinite returns full array in Matlab for sparse input

[Rik]

Update of bug #63277 (project octave):

              Item Group:    Matlab Compatibility => WTF, Matlab?!?         

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Follow-up Comment #3:

I posted this bug report because I wanted other developer opinions.  My own
opinion matches that of jwe: Matlab made an odd choice to have isfinite return
a full matrix.  Not only is this inconsistent with similar isXXX functions,
but it presumes to know more than the programmer.  In this case, the
intermediate "isfinite (x)" will be dense but "! isfinite (x)" will be back to
being pretty sparse.  I think the programmer should make the decision here. 
If they want a full matrix they can use full(), otherwise it stays as it's
original type.  As another example, would you expect a function to convert a
single data type to a double data type without the consent of the programmer?


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