Changes

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=== Merge duplicate variants ===

=== Drop duplicate variants ===

Merges duplicate variants by chromosome, position and alleles.  (This just discards the duplicate variant that appears later in the VCF file)

Drops duplicate variants that appear later in the file.

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   #merge duplicate variants and save output in mills.merged.vcf

   #merge duplicate variants and save output in mills.merged.vcf

   vt mergedups mills.vcf -o mills.merged.vcf

   vt uniq mills.vcf -o mills.merged.vcf

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   usage : vt mergedups [options] <in.vcf>

   usage : vt uniq [options] <in.vcf>

   options : -o  output VCF file [-]

   options : -o  output VCF file [-]