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

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

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