[Numpy-discussion] New functions.

[Travis Oliphant]

On May 31, 2011, at 8:08 PM, Charles R Harris wrote:

> Hi All,
> 
> I've been contemplating new functions that could be added to numpy and thought I'd run them by folks to see if there is any interest.
> 
> 1) Modified sort/argsort functions that return the maximum k values.
>     This is easy to do with heapsort and almost as easy with mergesort.

+1 

> 
> 2) Ufunc fadd (nanadd?) Treats nan as zero in addition. Should make a faster version of nansum possible.

+0  --- Some discussion at the data array summit led to the view that supporting nan-enabled dtypes (nanfloat64, nanfloat32, nanint64) might be a better approach for nan-handling.   This needs more discussion, but useful to mention in this context. 

> 
> 3) Fast medians.

Definitely order-statistics would be the right thing to handle generally.

-Travis

> 
> 
> Chuck
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---
Travis Oliphant
Enthought, Inc.
oliphant at enthought.com
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