[Octave-bug-tracker] [bug #52342] vecnorm command

[Rik]

Update of bug #52342 (project octave):

                  Status:         Patch Submitted => Fixed                  
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #10:

I checked in a patch here
http://hg.savannah.gnu.org/hgweb/octave/rev/3d96400df713.

I added validation for the dimension argument, and added more complete code to
detect the first non-singleton dimension.  I also added a separate
TeX-formatted definition of the p-norm to the docstring so that it appears
nicely in the Octave Manual.  

In terms of performance, I found for the case of n == 2 that using sumsq()
resulted in a 15X speed-up over abs().  This is much faster than using the
vectorized real^2 + imag^2 as well.  Finally, the vectorized code seems to
outperform abs() when p is evenly divisble by 2.  So I split the generic
calculation based on whether p is even or odd and use vectorized cod or abs()
appropriately.

Marking as fixed and closing report.


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