Subject: | Bug in PDL::GSL::CDF |
Date: | Fri, 25 Sep 2015 08:50:49 -0400 |
To: | bug-PDL-Stats [...] rt.cpan.org |
From: | Eric Damien <jafa82 [...] gmail.com> |
Dear maintainer(s),
I would like to point what I consider a mistake to you:
$ gsl_cdf_hypergeometric_P(0,2,8,6) # just a reference
0.133333333333333
$ gsl_cdf_hypergeometric_P(-1,2,8,6) # the error
1
$ gsl_cdf_hypergeometric_P(18,2,8,6) # another reference
1
As one can see gsl_cdf_hypergeometric_P reports a CDF value of 1 for a
negative value (when 0 is expected).
I did not investigate all the other functions (i.e. CDFs), but having been
reviewing a program I am writing down to this brick, I think it may be
useful
to ensure about the rest.
Nonetheless, thank you for a great piece of work,
Eric Damien.
P.S:
PDL::Stats $VERSION = '0.72' ;
Perl 5.20 .