Re: Updates for the incomplete beta functions in scipy.special

On 5/10/23, Ralf Gommers <[email protected]> wrote:
> On Thu, May 11, 2023 at 12:12 AM Warren Weckesser <
> [email protected]> wrote:
>
>> Hey all,
>>
>> In the pull request https://github.com/scipy/scipy/pull/17697, I
>> propose the following changes for functions in `scipy.special` that
>> are related to the incomplete beta function:
>>
>> * Use boost's `ibeta` as the backend for `special.betainc` and boost's
>> `ibeta_inv` as the backend for `special.betaincinv`.  This replaces
>> the Cephes-based backend for these functions.
>> * Add `special.betaincc` and `special.betainccinv` as wrappers of
>> boost's  `ibetac` and `ibetac_inv`, resp. These are the
>> "complementary" versions of  the functions.
>> * Make the existing names `special.btdtr` and `special.btdtri` aliases
>> of  `special.betainc` and `special.betaincinv`, resp.
>>
>> The names for the new functions `betaincc` and `betainccinv` follow
>> the  pattern of the names of the existing incomplete gamma functions.
>> That is, the names betainc, betaincinv, betaincc and betainccinv are
>> analogous to the existing names gammainc, gammaincinv, gammaincc and
>> gammainccinv.
>>
>> Because this introduces the new functions `betaincc` and
>> `betainccinv`, it  is more than a basic maintenance change, so
>> feedback from the mailing list would be appreciated.
>>
>
> Thanks Warren. The new names are nicer, and your PR looks great. So +1 from
> me.
>
> Cheers,
> Ralf
>

An update on the proposed change in
https://github.com/scipy/scipy/pull/17697:  instead of making `btdtr`
and `btdtri` aliases of `betainc` and `betaincinv` (with the idea that
`btdtr` and `btdtri` would eventually be deprecated), now `btdtr` and
`btdtri` are deprecated in the pull request.  According to
https://scipy.github.io/devdocs/dev/core-dev/index.html#deprecations,
deprecations should be brought up on the mailing list.  Although it
might have been implied in the original email and in the first version
of the PR that *eventually* `btdtr` and `btdtri` would be deprecated,
now they *are* deprecated in the PR, so this follow-up email is to let
everyone know about it.

Warren
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