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).
-Inf
Inf
qagi
The options hash reference accepts the following keys:
epsabs - The maximum allowable absolute error. The default is 0 (ignored).
0
epsrel - The maximum allowable relative error. The default is 1e-7.
1e-7
calls - The number of points sampled in the function space. The default is 1000.
engine - This key is mostly for internal use, however if the value 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).
fast
qng
qag
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.
PERLGSL_LIBS
--libs
gsl-config --libs
PerlGSL
PerlGSL::Integration::MultiDim
http://www.gnu.org/software/gsl/manual/html_node/Numerical-Integration.html
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)
To install PerlGSL::Integration::SingleDim, copy and paste the appropriate command in to your terminal.
cpanm
cpanm PerlGSL::Integration::SingleDim
CPAN shell
perl -MCPAN -e shell install PerlGSL::Integration::SingleDim
For more information on module installation, please visit the detailed CPAN module installation guide.