Math::GSL::Sys -
use Math::GSL::Sys qw /:all/;
Here is a list of all the functions in this module :
gsl_log1p($x) - This function computes the value of \log(1+$x) in a way that is accurate for small $x.
It provides an alternative to the BSD math function log1p(x).
=item * gsl_expm1($x) - This function computes the value of \exp($x)-1 in a way that is accurate for small $x.
It provides an alternative to the BSD math function expm1(x).gsl_hypot($x,
$y) - This function computes the value of \sqrt{$x^2 + $y^2} in a way that avoids overflow.
It provides an alternative to the BSD math function hypot($x,$y).gsl_hypot3($x,
$y,
$z) - This function computes the value of \sqrt{$x^2 + $y^2 + $z^2} in a way that avoids overflow.gsl_acosh($x) - This function computes the value of \arccosh($x).
It provides an alternative to the standard math function acosh($x).gsl_asinh($x) - This function computes the value of \arcsinh($x).
It provides an alternative to the standard math function asinh($x).gsl_atanh($x) - This function computes the value of \arctanh($x).
It provides an alternative to the standard math function atanh($x).gsl_isnan($x) - This function returns 1 if $x is not-a-number.gsl_isinf($x) - This function returns +1 if $x is positive infinity,
-1 if $x is negative infinity and 0 otherwise.gsl_finite($x) - This function returns 1 if $x is a real number,
and 0 if it is infinite or not-a-number.gsl_nan gsl_posinf gsl_neginf gsl_fdiv gsl_coerce_double gsl_coerce_float gsl_coerce_long_double gsl_ldexp($x,
$e) - This function computes the value of $x * 2**$e.
It provides an alternative to the standard math function ldexp($x,$e).gsl_frexp($x) - This function splits the number $x into its normalized fraction f and exponent e,
such that $x = f * 2^e and 0.5 <= f < 1.
The function returns f and then the exponent in e.
If $x is zero,
both f and e are set to zero.
This function provides an alternative to the standard math function frexp(x,
e).gsl_fcmp($x,
$y,
$epsilon) - This function determines whether $x and $y are approximately equal to a relative accuracy $epsilon.
The relative accuracy is measured using an interval of size 2 \delta,
where \delta = 2^k \epsilon and k is the maximum base-2 exponent of $x and $y as computed by the function frexp.
If $x and $y lie within this interval,
they are considered approximately equal and the function returns 0.
Otherwise if $x < $y,
the function returns -1,
or if $x > $y,
the function returns +1.
Note that $x and $y are compared to relative accuracy,
so this function is not suitable for testing whether a value is approximately zero.
The implementation is based on the package fcmp by T.C.
Belding.For more informations on the functions, we refer you to the GSL offcial documentation: http://www.gnu.org/software/gsl/manual/html_node/
Tip : search on google: site:http://www.gnu.org/software/gsl/manual/html_node/ name_of_the_function_you_want
Jonathan Leto <jonathan@leto.net> and Thierry Moisan <thierry.moisan@gmail.com>
Copyright (C) 2008 Jonathan Leto and Thierry Moisan
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
