[SciPy-dev] L0 norm

Jason Rennie jrennie@gmail....
Mon Oct 26 12:07:50 CDT 2009


SciPy.linalg.basic.norm (version 0.7.0) raises a division-by-zero error when
an ord value of zero is used.  Yet, the L0 norm is commonly defined as the
number of non-zero elements in a vector (see wikipedia link below).  Has
there been any discussion of adding an if statement to
scipy.linalg.basic.norm to handle this case?  Or, is this the behavior in a
future version of scipy?  If this functionality hasn't yet been added, would
anyone object to a ticket being created requesting this feature?

http://en.wikipedia.org/wiki/L0_norm#Zero_norm

Cheers,

Jason

-- 
Jason Rennie
Research Scientist, ITA Software
617-714-2645
http://www.itasoftware.com/
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