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

[Marco Caliari]

Follow-up Comment #8, bug #52342 (project octave):

@Rik: thanks, but even with your benchmark I get


octave:2> bm_abs
p =  1
abs: 0.714665
vec: 1.971066
p =  2
abs: 0.521653
vec: 0.423401
p =  3
abs: 0.528376
vec: 1.997253
p =  4
abs: 2.186915
vec: 0.267811
p =  5
abs: 2.248042
vec: 1.992120
p =  6
abs: 2.245626
vec: 0.280838
p =  7
abs: 2.230526
vec: 1.960336
p =  8
abs: 2.222762
vec: 1.882994


The vectorized code is in general faster, even for the most common p=2 (and
apart from the weird cases). This is true both in 4.2.1 and 4.3.0+. It was
always true for me: in fact, I teach my students this trick since a long
time.
Anyway, this is a different topic, I can write vecnorm in the easy way (with
abs).

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