Math::FFT - Perl module to calculate Fast Fourier Transforms - metacpan.orgNAME Math::FFT - Perl module to calculate Fast Fourier Transforms SYNOPSIS use Math::FFT; my $PI = 3.1415926539; my $N = 64; my ($series, $other_series); for (my $k=0; $k<$N; $k++) { $series->[$k] = sin(4*$k*$PI/$N) + cos(6*$k*$PI/$N); } my $fft = new Math::FFT($series); my $coeff = $fft->rdft(); my $spectrum = $fft->spctrm; my $original_data = $fft->invrdft($coeff); for (my $k=0; $k<$N; $k++) { $
