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Top Forums Shell Programming and Scripting Why do we use sort before compare ? Post 302257787 by yahyaaa on Thursday 13th of November 2008 04:55:46 AM
Old 11-13-2008
Why do we use sort before compare ?

Dear All.

Im trying to know how exactly the command "compare" works, does it compare line by line or field by field, and the most important thing is that why the files have to be sorted before we compare them?

Thanks in advance
 

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VCF-COMPARE(1)							   User Commands						    VCF-COMPARE(1)

NAME
vcf-compare - compare bgzipped and tabix indexed VCF files SYNOPSIS
compare-vcf [OPTIONS] file1.vcf file2.vcf ... DESCRIPTION
About: Compare bgzipped and tabix indexed VCF files. (E.g. bgzip file.vcf; tabix -p vcf file.vcf.gz) OPTIONS
-c, --chromosomes <list|file> Same as -r, left for backward compatibility. Please do not use as it will be dropped in the future. -d, --debug Debugging information. Giving the option multiple times increases verbosity -H, --cmp-haplotypes Compare haplotypes, not only positions -m, --name-mapping <list|file> Use with -H when comparing files with differing column names. The argument to this options is a comma-separated list or one mapping per line in a file. The names are colon separated and must appear in the same order as the files on the command line. -R, --refseq <file> Compare the actual sequence, not just positions. Use with -w to compare indels. -r, --regions <list|file> Process the given regions (comma-separated list or one region per line in a file). -s, --samples <list> Process only the listed samples. Excluding unwanted samples may increase performance considerably. -w, --win <int> In repetitive sequences, the same indel can be called at different positions. Consider records this far apart as matching (be it a SNP or an indel). -h, -?, --help This help message. vcf-compare 0.1.5 July 2011 VCF-COMPARE(1)
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