[Numpy-discussion] New ufuncs

[Travis E. Oliphant]

Charles R Harris wrote:
>
>
> On Sun, Nov 9, 2008 at 11:29 PM, T J <tjhnson at gmail.com 
> <mailto:tjhnson at gmail.com>> wrote:
>
>     On Thu, Nov 6, 2008 at 3:01 PM, T J <tjhnson at gmail.com
>     <mailto:tjhnson at gmail.com>> wrote:
>     > On Thu, Nov 6, 2008 at 2:36 PM, Charles R Harris
>     > <charlesr.harris at gmail.com <mailto:charlesr.harris at gmail.com>>
>     wrote:
>     >> I could add exp2, log2, and logaddexp2 pretty easily. Almost
>     too easily, I
>     >> don't want to clutter up numpy with a lot of functions.
>     However, if there is
>     >> a community for these functions I will put them in.
>     >>
>     >
>     > I worry about clutter as well.  Note that scipy provides log2
>     and exp2
>     > already (scipy.special).  So I think only logaddexp2 would be needed
>     > and (eventually) logdotexp2.  Maybe scipy.special is a better place
>     > than in numpy?  Then perhaps the clutter could be avoided....though
>     > I'm probably not the best one to ask for advice on this.  I will
>     > definitely use the functions and I suspect many others will as
>     > well---where ever they are placed.
>
>     Since no one commented further on this, can we go ahead and add
>     logaddexp2?  Once in svn, we can always deal with 'location' later---I
>     just don't want it to get forgotten.
>     __
>
>
> The functions exp2 and log2 are part of the C99 standard, so I'll add 
> those two along with log21p,
> exp21m, and logaddexp2. The names log21p and exp21p look a bit creepy 
> so I'm open to suggestions.
I think the C99 standard is a good place to draw the line. 

We can put other ufuncs in scipy.special


-Travis