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Full Discussion: removing certain tabs
Top Forums Shell Programming and Scripting removing certain tabs Post 302085400 by djkane on Thursday 17th of August 2006 04:58:09 AM
Old 08-17-2006
removing certain tabs

I have a tab delimited file with many lines, one for each record.

each line is tab delimited with a tab before the first data field, a tab between each data field, and a tab after the last data field before it moves onto the next line.

I need to remove only the preceeding tab before the first data field and the tab after the last data field.

I'm sure this can be done with sed, but I don't really know the command that well.

Can anyone help?
 

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VCF-ISEC(1)							   User Commands						       VCF-ISEC(1)

NAME
vcf-isec - create intersections, unions, complements on bgzipped and tabix indexed VCF or tab-delimited files SYNOPSIS
vcf-isec [OPTIONS] file1.vcf file2.vcf ... DESCRIPTION
About: Create intersections, unions, complements on bgzipped and tabix indexed VCF or tab-delimited files. Note that lines from all files can be intermixed together on the output, which can yield unexpected results. OPTIONS
-C, --chromosomes <list|file> Process the given chromosomes (comma-separated list or one chromosome per line in a file). -c, --complement Output positions present in the first file but missing from the other files. -d, --debug Debugging information -f, --force Continue even if the script complains about differing columns. -o, --one-file-only Print only entries from the left-most file. Without -o, all unique positions will be printed. -n, --nfiles [+-=]<int> Output positions present in this many (=), this many or more (+), or this many or fewer (-) files. -p, --prefix <path> If present, multiple files will be created with all possible isec combinations. (Suitable for Venn Diagram analysis.) -t, --tab <chr:pos:file> Tab-delimited file with indexes of chromosome and position columns. (1-based indexes) -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. EXAMPLES
bgzip file.vcf; tabix -p vcf file.vcf.gz bgzip file.tab; tabix -s 1 -b 2 -e 2 file.tab.gz vcf-isec 0.1.5 July 2011 VCF-ISEC(1)
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