GWAS on subset of UKBioBank

Hail Query & hailctl
26

@tpoterba your method seems to be working well, though saving the results takes a really really long time. Is that to be expected?

batch_results = hl.linear_regression_rows(
    [geno_subset_mt.phenos[i] for i in range(batch_size)],
    geno_subset_mt.dosage,
    covariates=[1.0],
    block_size=128)

batch_results.write('test') # takes a really long time