OpenEuphoria

Re: New proposal for math.e

• Posted by Juergen Luethje <j.lue at gmx?de> Aug 03, 2007
• 695 views

CChris wrote:

<snip>

> Since no one replied to my first proposal, I'll repeat it: add a gamma()
> function
> and an erf() function, since they re very commonly used in analysis and
> statistics.
> Note that an incomplete gamma function could be an even better idea than
> erf(),
> as erf() is a special, very frequent occurrence of incomplete_gamma(x,z) after
> a trivial transform. The general incomplete_gamma() arises in physics rather.
> The value of the Euler constant (=-gamma'(1)) would be a logical addition then
> too.
> 
> 1/sqrt(2*PI) is a very common normalisation constant as well, both in
> statistics
> and in Fourier series calculations, so it may not hurt to have it on board as
> well.
> 
> The most difficult thing here could be to port some Fortran code to Eu to do
> the above, assuming the C compiler don't have this as standard. There is ample
> supply of such free code.

I do not even know the meaning of a gamma() and an erf() function, so I
can't provide code for them. But you probably can do so. 

Regards,
   Juergen