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Can you limit the compare on "comm" command

 
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Top Forums UNIX for Dummies Questions & Answers Can you limit the compare on "comm" command
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Old 03-23-2007
Can you limit the compare on "comm" command- ANSWER FOUND PLEASE IGNORE.
I need to find deleted records from a file. I compare yesterdays file.old to todays file.new. I need to find the records that were in yesterdays file that are not in todays. My file is fixed field. If I run a "comm -23" obviously what i find is not necesarilly a delete, it could be a change.

The first 10 characters of each line are always static. So my option is to cut the first 10 chars from each file into seperate fiels. COmpare these seperate files. That way I find true delete records. Problem is I need the rest of the record that I cut off. I know I can somehow creatively use awk and grep to rebuild these, but I was wondering:

Is there an option to pass to the com command to tell it to only compare the frist 10 characters of each line inmy 2 files? Thus making all the extra work not necessary.

Thank you.

I figured out a way to do this. thank you all for viewing the message.
Last edited by eja; 03-28-2007 at 11:21 AM..
 
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LEARN ABOUT DEBIAN

vcf-compare

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)