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MaCH FAQ

12 bytes removed, 20:30, 15 February 2011
How do I get imputation quality estimates?
Estimated per allele error rate is 0.0293
A better approach is to mask a small proportion of SNPs (vs. genotypes in the above simple approach). One can generate a mask.dat from the original .dat file by simply changing the flag of a subset of markers from M to S2 without duplicating the .ped file. Post-imputation, one can use   [http://wwwgenome.sph.umich.edu/csg/ylwtxwiki/CalcMatch.1.0.5.tgz CalcMatch ]and [http://www.sph.umich.edu/csg/ylwtx/doseR2.tgz doseR2.pl ]to estimate genotypic/allelic error rate and correlation respectively. Both programs can be downloaded from [http://www.sph.umich.edu/csg/ylwtx/software.html http://www.sph.umich.edu/csg/ylwtx/software.html].
'''Warning''': Imputation involving masked datasets should be performed separately for imputation quality estimation. For production, one should use all available information.
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