Add a Perl script to convert the output of find-pairwise-distance to a PGM file for...

diff --git a/pairwise-to-pgm.pl b/pairwise-to-pgm.pl
new file mode 100644 (file)
index 0000000..3e11fc8
--- /dev/null
+++ b/pairwise-to-pgm.pl
@@ -0,0 +1,17 @@
+#! /usr/bin/perl
+use strict;
+use warnings;
+use POSIX;
+
+my $width = 599;
+my $height = 599;
+my $max = 7263081;
+
+print "P5\n$width $height\n255\n";
+while (<>) {
+       /(\d+) (\d+) (\d+)/ or die;
+       my ($i, $j, $z) = ($1, $2, $3);
+       $z = log($z + 1.0) / log($max + 1.0);
+       $z = pow($z, 20);
+       print chr(int(255.0 * $z));
+}