mirror of
git://projects.qi-hardware.com/wernermisc.git
synced 2024-11-22 21:21:52 +02:00
62 lines
1.2 KiB
Perl
Executable File
62 lines
1.2 KiB
Perl
Executable File
#!/usr/bin/perl
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sub usage
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{
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print STDERR "usage: $0 [-i] [log_file]\n";
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exit(1);
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}
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$with = "steps";
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if ($ARGV[0] eq "-i") {
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shift @ARGV;
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$with = "lines";
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}
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&usage if $ARGV[0] =~ /^-/;
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$n = 1;
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while (<>) {
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next unless /^=== (\d+) ===/;
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while ($1 != $n) {
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push(@f, $n);
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$n++;
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}
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$n++;
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}
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$n--;
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$f = int($n/@f+0.5);
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$last = 0;
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for (@f) {
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push(@d, $_-$last);
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$last = $_;
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}
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$cmd = "|gnuplot -e '".
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'set term postscript color eps enhanced solid lw 2 20;'.
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'set output "out.eps";'.
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'set title "Probability distribution of time between NOR corruptions";'.
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'set xlabel "Power cycles";'.
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'set ylabel "Cumulative probability";'.
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'set key bottom;'.
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'plot "-" with '.$with.' title "Empirical distribution (N='.@f.')", '.
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'1-exp(-'.1/$f.'*x) with lines lt 3 '.
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'title "Exponential distribution ({/Symbol l}=1/'.$f.')"'.
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"'";
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open(PIPE, $cmd) || die "open: $!";
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print PIPE "0 0\n";
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$i = 0;
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for (sort { $a <=> $b } @d) {
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$i++;
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print PIPE $_, " ", $i/@f, "\n";
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}
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close(PIPE) || die "close: $!";
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system("cat out.eps | ".
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"gs -sDEVICE=ppmraw -r100 -sOutputFile=- ".
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"-dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sPAPERSIZE=a4 -q - | ".
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"convert -trim - out.png");
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unlink("out.eps");
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