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[Octave-bug-tracker] [bug #42688] isdiag, isbanded, istril, istriu funct


From: Pantxo Diribarne
Subject: [Octave-bug-tracker] [bug #42688] isdiag, isbanded, istril, istriu functions missing in Octave
Date: Mon, 07 Jul 2014 10:36:53 +0000
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:30.0) Gecko/20100101 Firefox/30.0

Follow-up Comment #1, bug #42688 (project octave):

Hi Massimiliano,

I have a few remarks:
* some shape validations functions like isvector, isrow ... were recently
translated from .m to C++ for performance (see changeset
http://hg.savannah.gnu.org/hgweb/octave/rev/4f0e4f20a33f). I wonder if the new
ones you propose shouldn't have the same performance constraint. Anyways, a
preliminary (or definite) .m implementation is valuable
* the new functions should eventually return true only for 2 dimensional
matrices (see "ndims")
* in order to return a boolean, a cleaner approach would be using "all" in
place of "min".

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  <http://savannah.gnu.org/bugs/?42688>

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