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Full Discussion: awk regular expression
Top Forums Shell Programming and Scripting awk regular expression Post 302785025 by Yoda on Sunday 24th of March 2013 10:35:31 AM
Old 03-24-2013
You could do:
Code:
awk '$1 ~ /^chr[2-4]*[LRX]*$/' input | sort -k1,1 -k2,2n

EDIT: But If you want to match strictly only chr2L || chr2R || chr3L || chr3R || chr4 || chrX, then above regexp is wrong.

It will match other combinations as well. I think what you did is correct.

Last edited by Yoda; 03-24-2013 at 11:40 AM..
This User Gave Thanks to Yoda For This Post:
 

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PPI::Token::Regexp::Match(3pm)				User Contributed Perl Documentation			    PPI::Token::Regexp::Match(3pm)

NAME
PPI::Token::Regexp::Match - A standard pattern match regex INHERITANCE
PPI::Token::Regexp::Match isa PPI::Token::Regexp isa PPI::Token isa PPI::Element SYNOPSIS
$text =~ m/match regexp/; $text =~ /match regexp/; DESCRIPTION
A "PPI::Token::Regexp::Match" object represents a single match regular expression. Just to be doubly clear, here are things that are and aren't considered a match regexp. # Is a match regexp /This is a match regexp/; m/Old McDonald had a farm/eieio; # These are NOT match regexp qr/This is a regexp quote-like operator/; s/This is a/replace regexp/; METHODS
There are no methods available for "PPI::Token::Regexp::Match" beyond those provided by the parent PPI::Token::Regexp, PPI::Token and PPI::Element classes. Got any ideas for methods? Submit a report to rt.cpan.org! SUPPORT
See the support section in the main module. AUTHOR
Adam Kennedy <adamk@cpan.org> COPYRIGHT
Copyright 2001 - 2011 Adam Kennedy. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of the license can be found in the LICENSE file included with this module. perl v5.10.1 2011-02-26 PPI::Token::Regexp::Match(3pm)
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