Downsamplesamples

[iris-garden]

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The following post was exported from discuss.hail.is, a forum for asking questions about Hail which has since been deprecated.

(Sep 12, 2016 at 20:28) kyle said:

I ran into a situation today (trying to output some representative HomRef genotypes so I could look at allele balance behavior for those calls) where the ability to downsample samples would have been nice. I did use the downsamplevariants function, too.

[iris-garden]

Note

The following post was exported from discuss.hail.is, a forum for asking questions about Hail which has since been deprecated.

(Sep 28, 2016 at 21:45) tpoterba said:

Hey Kyle! You can do this now. Jon added a function in the expr language pcoin(p) which will give you a random flip of a coin with probability p.

This will keep 10% (approximately) of samples:

  vds.filter_samples_expr('pcoin(.1)')

[iris-garden]

Note

The following post was exported from discuss.hail.is, a forum for asking questions about Hail which has since been deprecated.

(Sep 29, 2016 at 03:24) kyle said:

Cool! That’s useful. Thanks for the update.