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Newsgroups: comp.lang.ada
Date: Wed, 3 Apr 2019 09:01:27 -0700 (PDT)
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Subject: Re: Erfc() function in ADA
From: leov@gammawizard.com
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Xref: reader01.eternal-september.org comp.lang.ada:56058
Date: 2019-04-03T09:01:27-07:00
List-Id: <comp.lang.ada>

On Tuesday, April 2, 2019 at 6:39:59 AM UTC-4, gautier...@hotmail.com wrote:
> A few random remarks...
> 
> 1) For further references: there is now in Mathpaqs (rev. 153+) a separate Erf_function package.
> Since Phi_function.Phi uses Erf(x) anyway, it's better to have access to Erf directly.
> 
> 2) About the Numerical Recipies: be careful, some versions support only 7-8 digits (single precision), so numerical errors cumulate very quickly.
> 
> 3) Some good stuff can be found in the Alglib and Cephes libraries, in C, Fortran or Pascal
> 
> 4) Simple special functions (with one parameter) could well be in an official Ada.Numerics.Generic_Special_Functions (low maintenance effort for compiler vendors)
> 
> 5) Don't forget to check: https://www.adaic.org/ada-resources/tools-libraries/
> 
> 6) Perhaps the Alire system has some math packages ?

Thanks for enhancing the library. I just ported my code and the Phi function is working like a charm.