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Perl interface to the GNU Scientific Library

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math--gsl / examples / sf / bessel
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#!/usr/bin/perl -w
# Run this script in the same directory as plot_bessel.gnuplot
# i.e         cd examples/sf ; ./bessel 
use strict;
use warnings;
use Math::GSL::SF qw/:bessel/;
 
my @x    = map { $_/ 100 } ( 0 .. 2000 ) ;
my @negx = map { -$_ } reverse @x ;
 
open my $fh, '>', 'bessel.data' or die $!;
 
for my $t (@negx, @x ) {
   print $fh join (" ", $t,  map { gsl_sf_bessel_Jn( $_, $t) } (0..5)) . "\n";
}
close $fh;
 
qx "gnuplot -persist plot_bessel.gnuplot";