Rdatatable / Rdatatable/data.table
[R-Forge #2590] During grouping, last group overwrites memory used by previous groups
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bug
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- R
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Description
Submitted by: Matt Dowle; Assigned to: Nobody; R-Forge link
As raised here on SO. I had a look and made progress but couldn't for the life of me work out why the last group is reused.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The issue names no repository file or test; begin with the linked Stack Overflow example and R-Forge report, reproducing the grouped update(lm(...)) case. Trace why the last group reuses or overwrites model data; done means earlier groups retain their own model data, with a regression check once the relevant test location is found.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- r
- Domain
- data
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100