--- /dev/null
+#!/usr/bin/perl -w
+# -*-Perl-*-
+# Last changed Time-stamp: <2005-03-09 19:38:25 ivo>
+# produce Pauline's mountain representation from bracket notation
+# use e.g. as RNAfold < foo.seq | b2mt | xmgr -pipe
+# definition: h=number of base pairs enclosing base
+use strict;
+while (<>) {
+ print if (s/>/#/);
+
+ next unless (/\.\.\./);
+ next if (/\[/); # don't process output from partition function
+ chop;
+ my @F=split(//,$_);
+ my $p=0; my $h=0;
+ foreach my $i (@F) {
+ $h-- if ($i eq ')');
+ $p++;
+ printf("%4d %4d\n",$p,$h);
+ $h++ if ($i eq '('); # increase $h *after* printing
+ }
+ print "&\n";
+}
+
+=head1 NAME
+
+b2mt - produce coordinates for a mountain plot from bracket notation
+
+=head1 SYNOPSIS
+
+ b2mt.pl < seq.fold > mountain.dat
+
+=head1 DESCRIPTION
+
+read a secondary structures in bracket notation as output by RNAfold,
+and compute coordinates for a mountain plot as introduced by Pauline Hogeweg.
+The output is suitable for graphing with xmgrace, e.g.:
+C< RNAfold < foo.seq | b2mt.pl | xmgrace -pipe>
+
+=head1 AUTHOR
+
+Ivo L. Hofacker <ivo@tbi.univie.ac.at>