--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/filters/fixedValueColumn.pl	Fri Mar 09 19:37:19 2012 -0500
@@ -0,0 +1,34 @@
+#! /usr/bin/perl -w
+
+use strict;
+use warnings;
+
+# fixedValueColumn.pl $input $out_file1 "expression" "iterate [yes|no]"
+
+my ($input, $out_file1, $expression, $iterate) = @ARGV;
+my $i = 0;
+my $numeric = 0;
+
+die "Check arguments\n" unless @ARGV == 4;
+
+open (DATA, "<$input") or die "Cannot open $input:$!\n";
+open (OUT,  ">$out_file1") or die "Cannot create $out_file1:$!\n";
+
+if ($expression =~ m/^\d+$/) {
+  $numeric = 1;
+  $i = $expression;
+}
+
+while (<DATA>) {
+  chop;
+  if ($iterate eq "no") {
+    print OUT "$_\t$expression\n";
+  } else {
+    print OUT "$_\t$i\n" if $numeric == 1;
+    print OUT "$_\t$expression-$i\n" if $numeric == 0;
+    ++$i;
+  }
+}
+
+close DATA;
+close OUT;