[SciPy-dev] L0 norm

Jason Rennie jrennie@gmail....
Mon Oct 26 13:31:28 CDT 2009


Done.

http://projects.scipy.org/scipy/ticket/1037

Cheers,

Jason

On Mon, Oct 26, 2009 at 1:14 PM, David Goldsmith <d.l.goldsmith@gmail.com>wrote:

> Please do file a ticket: http://scipy.org/BugReport.  Thanks!
>
> DG
>
> On Mon, Oct 26, 2009 at 10:07 AM, Jason Rennie <jrennie@gmail.com> wrote:
>
>> 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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>>
>
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-- 
Jason Rennie
Research Scientist, ITA Software
617-714-2645
http://www.itasoftware.com/
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