Return length of overlap in foverlaps
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Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 35/100
Research direction
Start with the foverlaps entry point and its existing minoverlap handling, which is noted as not yet implemented. Review how overlap widths are calculated and determine the API and expected behavior for returning those lengths; done means the requested overlap lengths are returned without changing the default behavior, with tests covering the new option.
Written by the indexing model from the issue text.
Description
From the not yet implemented argument minoverlap in foverlaps: "...length of overlap between these two intervals is...".
Given that the length of overlaps will be calculated anyway when minoverlap eventually is implemented, wouldn't it be nice to be able to return these lengths, perhaps through an additional argument like e.g. lengthoverlaps = FALSE (default) / TRUE?
I have seen quite a few posts on such overlap widths in genomics (calculated using functions in GenomicRanges, e.g. here, here, and here) and in posts on overlapping date ranges.
I wish to take the opportunity to thank everyone in the data.table team for your fantastic work!
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