1 files changed, 6 insertions, 2 deletions
diff --git a/pairwise.pl b/pairwise.pl
index f721575..693b664 100755
--- a/pairwise.pl
+++ b/pairwise.pl
@@ -3,6 +3,8 @@
 use strict;
 use warnings;
 
+use Scalar::Util qw(looks_like_number);
+
 die "usage: $0 threshold file […]\n" unless $#ARGV > 0;
 
 my $threshold = shift;
@@ -14,9 +16,11 @@ while (<>) {
   chomp;
   my @parts = split /,/;
   for (my $i=1; $i <= $#headers; $i++) {
-    if (defined $parts[$i]) {
+    if (defined $parts[$i] && looks_like_number($parts[$i])) {
+      # print STDERR "#h: $#headers #p: $#parts\n";
+      # print STDERR "parts: @parts\n";
       my $similarity = $parts[$i];
-      print "$parts[0],$headers[$i]\n" if $similarity >= $threshold;
+      print "$parts[0],$headers[$i]\n" if $similarity > $threshold;
     }
   }
 }