Re: Erfc() function in ADA

[Jerry <list_email@icloud.com>]

On Monday, April 1, 2019 at 9:29:00 AM UTC-7, le...@gammawizard.com wrote:
> Greetings, I have been looking into reimplementing a collection of numerical heavy code from R/C++ into ADA and so far things seem doable. My only question is about the support for the error function and in particular the complementary error function erfc(). I assume this is library dependent so I would appreciate any information if erfc() is part of the ADA standard library or perhaps provided by GNAT in some form?
> 
> -Leo

I have used Ada for intense numerical work for many years and it awesome for that. But from time to time I need a special function and then I frown. I have linked to libraries in GNU Scientific Library and Octave and a couple of times to specialized libraries. I have translated Numerical Recipes to Ada. (Thanks to Gautier for the Pascal-to-Ada converter but one can also convert it quickly yourself if you want to.) I've even cobbled together a few lines that write an Octave (Matlab) script to a text file, then call Octave to execute it, and read the results from a second file back into my Ada program. And not long ago someone on this list (sorry, forgot who, but a regular poster) put up a way to connect to Julia code--this is really promising but I haven't followed up on that.

Having a deep, readily-accessible access to numerical code has been a problem with Ada: I wish there would be a concerted effort to alleviate this deficiency.

Jerry