Sequence data
VCF local genotype expansion
Map an extracted Number=LG field through LAA into global genotype slots.
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Example resultHow it works
Enumerate local genotypes in VCF colex order, map the authored LAA sequence to global allele IDs and calculate each sorted genotype’s exact combination index. Preserve supplied missing tokens separately from unrepresented global slots.
With three ALT alleles, diploidy and LAA 1,3, six local values map to global slots 0,1,2,6,7,9. The other four global slots remain missing.
Limits
One extracted VCF4.5 Number=LG field. ALT count 0–63, ploidy 1–8 and at most 100000 global genotype slots; raw ASCII value tokens up to 1000 characters, 2 million input characters and a 16 MiB report. A single dot is whole-field missing. Missing LAA is REF-only only when this local field is present. No numeric likelihood interpretation, genotype calling, phasing, biological interpretation or whole VCF validation.