10-23-2009
Using Perl to Merge Multiple Lines in a File
I've hunted and hunted but nothing seems to apply to what I need. Any help will be much appreciated!
My input file looks like (Unix):
marker,allele1,allele2
RS1002244,1,1
RS1002244,1,3
RS1002244,3,3
RS1003719,2,2
RS1003719,2,4
RS1003719,4,4
Most markers are listed 3 times but a few have 3 alleles and are listed more.
An example of a marker with 3 alleles is:
marker,allele1,allele2
RS757210,2,2
RS757210,2,3
RS757210,2,4
RS757210,3,3
RS757210,3,4
RS757210,4,4
I would like to get output like:
marker,allele1,allele2,allele3
RS1002244,1,3,.
RS1003719,2,4,,
RS757210,2,3,4
Thanks very much in advance, Peggy 10/23 (happy to have this in formats other than Perl, too)
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LEARN ABOUT MOJAVE
file::spec::functions
File::Spec::Functions(3pm) Perl Programmers Reference Guide File::Spec::Functions(3pm)
NAME
File::Spec::Functions - portably perform operations on file names
SYNOPSIS
use File::Spec::Functions;
$x = catfile('a','b');
DESCRIPTION
This module exports convenience functions for all of the class methods provided by File::Spec.
For a reference of available functions, please consult File::Spec::Unix, which contains the entire set, and which is inherited by the
modules for other platforms. For further information, please see File::Spec::Mac, File::Spec::OS2, File::Spec::Win32, or File::Spec::VMS.
Exports
The following functions are exported by default.
canonpath
catdir
catfile
curdir
rootdir
updir
no_upwards
file_name_is_absolute
path
The following functions are exported only by request.
devnull
tmpdir
splitpath
splitdir
catpath
abs2rel
rel2abs
case_tolerant
All the functions may be imported using the ":ALL" tag.
COPYRIGHT
Copyright (c) 2004 by the Perl 5 Porters. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
File::Spec, File::Spec::Unix, File::Spec::Mac, File::Spec::OS2, File::Spec::Win32, File::Spec::VMS, ExtUtils::MakeMaker
perl v5.18.2 2014-01-06 File::Spec::Functions(3pm)