[Vcftools-help] HELP: How is QUAL score recalculated by vcf-merge?

[Mark A. <ma...@kn...>]

When multiple quality scores are combined from different VCF files (via vcf-merge), how is the NEW quality score in the multi-sample vcf calculated using the individual quality scores from the single-sample vcfs? I've tried everything from geometric means to converting back to p-values and re-calculating the Phred score and nothing gives me the same value that VCFTools calculates!


Thanks,
Mark