[Numpy-discussion] New functions.

Robert Kern robert.kern@gmail....
Thu Jun 2 16:40:07 CDT 2011


On Wed, Jun 1, 2011 at 22:06, Travis Oliphant <oliphant@enthought.com> wrote:
>
> On May 31, 2011, at 8:08 PM, Charles R Harris wrote:

>> 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.

Actually, these are completely orthogonal to Chuck's proposal. The
NA-enabled dtypes (*not* NaN-enabled dtypes) would have (x + NA) ==
NA, just like R. fadd() would be useful for other things.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless
enigma that is made terrible by our own mad attempt to interpret it as
though it had an underlying truth."
  -- Umberto Eco


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