Differential hash expression

[olgabot]

Given a csv of metadata about samples, do a groupby on the csv, get hashes enriched in certain groups using logistic regression, then send them down the line to hash2kmer and diamond blastp to figure out what they are.

PR checklist

• [ ] This comment contains a description of changes (with reason)
• [ ] If you've fixed a bug or added code that should be tested, add tests!
• [ ] If necessary, also make a PR on the nf-core/predictorthologs branch on the nf-core/test-datasets repo
• [ ] Ensure the test suite passes (nextflow run . -profile test,docker).
• [ ] Make sure your code lints (nf-core lint .).
• [ ] Documentation in docs is updated
• [ ] CHANGELOG.md is updated
• [ ] README.md is updated

Learn more about contributing: CONTRIBUTING.md

[olgabot]

FYI getting exit code 139 when using this on data "in the wild:" https://groups.google.com/forum/?nomobile=true#!topic/nextflow/L9r_cZYf5lY

github gist of errors: https://gist.github.com/olgabot/e64b597b0eb6df3996cb196f0b41a13d

[olgabot]

Turns out it was a ulimit error: https://unix.stackexchange.com/questions/85457/how-to-circumvent-too-many-open-files-in-debian/85458#85458

Did:

ulimit -Sn 99999
sudo sh -c "ulimit -Hn 99999 ; exec su \"$USER\""

And decreased the input csv to contain only ~2000 signatures/samples which solved the problem