[Octave-bug-tracker] [bug #42688] isdiag, isbanded, istril, istriu functions missing in Octave

[Rik]

Update of bug #42688 (project octave):

                  Status:         Patch Submitted => In Progress            

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Follow-up Comment #4:

@Massimliano: I committed your changeset here
(http://hg.savannah.gnu.org/hgweb/octave/rev/49961d67e4b9).  I changed '~' to
'!' for logical not as that is the Octave convention.  I also removed the
third return argument from find() function calls since you weren't using it. 
I changed isnumeric() to isreal() when checking whether LOWER and UPPER are
acceptable inputs to isbanded().

Do you have access to Matlab to run a few more tests?  Right now we are
checking whether the matrix is numeric or logical.  Often Matlab will accept
character matrices as well.  Does this code return true?


isdiag (char ([65, 0; 0, 65]))


Also, if the test is only for structure Matlab often accepts cell arrays as
well.  What does Matlab return for


A = cell (2,2);
A(1,1) = 1;
A(2,2) = 2;
isdiag (A)



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