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# Calculation of PQ and TP values

Member Posts: 9
edited August 2012

Dear GATK team,

I'd like to be able to work through the calculations for the PQ (ReadBackedPhasing) and TP (PhaseByTransmission) values for small toy data sets. Is there an article or document anywhere that describes the algorithms used to calculate PQ and TP? Unfortunately I'm only a beginner at Java, so can't answer my questions by looking at the source code.

Thanks for all the great work you do with the GATK.

Best wishes,

Katherine

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