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Top Forums Shell Programming and Scripting Perl: filtering lines based on duplicate values in a column Post 302558129 by polsum on Thursday 22nd of September 2011 09:16:09 PM
Old 09-22-2011
Perl: filtering lines based on duplicate values in a column

Hi I have a file like this. I need to eliminate lines with first column having the same value 10 times.
Code:
13 18 1 + chromosome 1, 122638287 AGAGTATGGTCGCGGTTG
13 18 1 + chromosome 1, 128904080 AGAGTATGGTCGCGGTTG
13 18 1 - chromosome 14, 13627938 CAACCGCGACCATACTCT
13 18 1 + chromosome 1, 187172197 AGAGTATGGTCGCGGTTG
13 18 1 - chromosome X, 38407155 CAACCGCGACCATACTCT
13 18 1 + chromosome 9, 13503259 AGAGTATGGTCGCGGTTG
13 18 1 - chromosome 2, 105480832 CAACCGCGACCATACTCT
13 18 1 + chromosome 9, 49045535 AGAGTATGGTCGCGGTTG
13 18 1 + chromosome 1, 178729626 AGAGTATGGTCGCGGTTG
13 18 1 - chromosome X, 55081462 CAACCGCGACCATACTCT
9 17 2 + chromosome 10, 101398385 GCCAGTTCTACAGTCCG
9 17 2 - chromosome 3, 103818009 CGGACTGTAGAACTGGC
9 17 2 - chromosome 16, 94552245 CGGACTGTAGAACTGGC
4 18 1 - chromosome 18, 70056996 TACCCAACAACACATAGT

The value 13 in the first column is repeated 10 times in the consecutive lines. I need to eliminate all those lines in the output.

so the desired output will be
Code:
9 17 2 + chromosome 10, 101398385 GCCAGTTCTACAGTCCG
9 17 2 - chromosome 3, 103818009 CGGACTGTAGAACTGGC
9 17 2 - chromosome 16, 94552245 CGGACTGTAGAACTGGC
4 18 1 - chromosome 18, 70056996 TACCCAACAACACATAGT

Thank you much in advance. If it is possible a code in Perl would be much appreciated.Smilie
 

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HTML::FormatText(3)					User Contributed Perl Documentation				       HTML::FormatText(3)

NAME
HTML::FormatText - Format HTML as plaintext SYNOPSIS
require HTML::TreeBuilder; $tree = HTML::TreeBuilder->new->parse_file("test.html"); require HTML::FormatText; $formatter = HTML::FormatText->new(leftmargin => 0, rightmargin => 50); print $formatter->format($tree); DESCRIPTION
The HTML::FormatText is a formatter that outputs plain latin1 text. All character attributes (bold/italic/underline) are ignored. Formatting of HTML tables and forms is not implemented. You might specify the following parameters when constructing the formatter: leftmargin (alias lm) The column of the left margin. The default is 3. rightmargin (alias rm) The column of the right margin. The default is 72. SEE ALSO
HTML::Formatter COPYRIGHT
Copyright (c) 1995-2002 Gisle Aas, and 2002- Sean M. Burke. All rights reserved. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. AUTHOR
Current maintainer: Sean M. Burke <sburke@cpan.org> Original author: Gisle Aas <gisle@aas.no> perl v5.12.1 2004-06-02 HTML::FormatText(3)
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