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bcd6e09189
- range: generate min/avg/max data from FFT files - vizr: plot the output of "range" - row: make "viz" keep the FFT output and use it to generate the summary
54 lines
870 B
Perl
Executable File
54 lines
870 B
Perl
Executable File
#!/usr/bin/perl
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sub read
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{
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local ($n) = "$_[0].fft";
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local (@f);
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local $i = 0;
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local $ym, $v;
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open(FILE, $n) || die "$n: $!";
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while (<FILE>) {
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chop;
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push(@f, $_);
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$ym = $_ unless defined $ym && $ym > $_;
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}
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close FILE;
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for (@f) {
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$v = $_-$ym;
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$min[$i] = $v unless defined $min[$i] && $min[$i] < $v;
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$max[$i] = $v unless defined $max[$i] && $max[$i] > $v;
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$sum[$i] += $v;
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$i++;
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}
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}
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sub usage
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{
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print STDERR "usage: $0\n";
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exit(1);
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}
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&usage if @ARGV;
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#
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# @@@ for future study: use an x axis proportional to the center frequency,
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# instead of an absolute frequency.
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#
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for ($f = 2405; $f <= 2480; $f += 5) {
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&read($f);
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&read($f+1);
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$n += 2;
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}
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$mhz_per_bin = 100.0/16/@sum; # 100 MHz ADC, decimation 16
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$, = " ";
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for ($i = 0; $i != @sum; $i++) {
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print $mhz_per_bin*($i-@sum/2)+0.5, "";
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print $min[$i], $sum[$i]/$n, $max[$i], "\n";
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}
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