[SciPy-dev] draft: NumPy User Guide introduction

Alan G Isaac aisaac@american....
Tue Aug 25 07:49:16 CDT 2009


On 8/25/2009 4:56 AM Dag Sverre Seljebotn apparently wrote:
> why exactly is it that
> 
> arr.mean()
> 
> is OK, while arr.sin(), arr.cos() or arr.dot(otherarr) is not?
> 
> (It seems the rule is "array -> scalar" mappings are OK as method, 
> others are not, but that seems arbitrary to me.)


I do not know the original justification,
but conceptually, the mean is a property
of the data in the array.

As a user, I'd actually like to see
`dot` implemented as a method so we
could do a1.dot(a2).  This would make
a lot of code cleaner to read.

Alan Isaac



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