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26 lines
580 B
Perl
Executable File
26 lines
580 B
Perl
Executable File
#!/usr/bin/env perl
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use feature say;
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use utf8;
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use PDL::FFT;
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my $PI = 3.1415926539;
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my $N = 64;
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my ($series, $other_series);
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for (my $k=0; $k<$N; $k++) {
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$series->[$k] = sin(4*$k*$PI/$N) + cos(6*$k*$PI/$N);
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}
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my $fft = new Math::FFT($series);
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my $coeff = $fft->rdft();
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my $spectrum = $fft->spctrm;
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my $original_data = $fft->invrdft($coeff);
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for (my $k=0; $k<$N; $k++) {
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$other_series->[$k] = sin(16*$k*$PI/$N) + cos(8*$k*$PI/$N);
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}
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my $other_fft = $fft->clone($other_series);
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my $other_coeff = $other_fft->rdft();
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my $correlation = $fft->correl($other_fft);
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sub top_hat |