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walkers
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First pass of implementation of Reduced Reads with HaplotypeCaller. Main changes: a) Active region: scale PL's by representative count to determine whether region is active. b) Scale per-read, per-haplotype likelihoods by read representative counts. A read representative count is (temporarily) defined as the average representative count over all bases in read, TBD whether this is good enough to avoid biases in GL's. c) DeBruijn assembler inserts kmers N times in graph, where N is min representative count of read over kmer span - TBD again whether this is the best approach. d) Bug fixes in FragmentUtils: logic to merge fragments was wrong in cases where there is discrepancy of overlaps between unclipped/soft clipped bases. Didn't affect things before but RR makes prevalence of hard-clipped bases in CIGARs more prevalent so this was exposed. e) Cache read representative counts along with read likelihoods associated with a Haplotype. Code can/should be cleaned up and unified with PairHMMIndelErrorModelCode, as well as refactored to support arbitrary ploidy in HaplotypeCaller
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2012-08-03 12:24:23 -04:00 |