PerlGSL::Integration::SingleDim - A Perlish Interface to the GSL 1D Integration Library
use PerlGSL::Integration::SingleDim qw/int_1d/; my $result = int_1d(sub{ exp( -($_[0]**2) ) }, 0, 'Inf');
This module is an interface to the GSL's Single Dimensional numerical integration routines.
No functions are exported by default.
This is the main interface provided by the module. It takes three required arguments and an (optional) options hash. The first argument is a subroutine reference defining the integrand. The next two are numbers defining the lower and upper bound of integration. The strings -Inf
for a lower limit, and Inf
for an upper limit are allowed as well (triggering the qagi
-type engines).
The options hash reference accepts the following keys:
0
(ignored).1e-7
.fast
is given, the qng
engine will be used if possible. Other values (the qag
type engines) are determined internally as needed. The default is qag
with a 21 point sample (this sampling setting is not configurable yet, but this is a reasonable choice).In scalar context the result is returned, in list context the result and the standard deviation (error) are returned.
This module needs the GSL library installed and available. The PERLGSL_LIBS
environment variable may be used to pass the --libs
linker flags; if this is not specified, the command gsl-config --libs
is executed to find them. Future plans include using an Alien module to provide the GSL in a more CPAN-friendly manner.
http://github.com/jberger/PerlGSL-Integration-SingleDim
Joel Berger, <joel.a.berger@gmail.com>
Copyright (C) 2012 by Joel Berger
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
The GSL is licensed under the terms of the GNU General Public License (GPL)