Explainer of merge
Open
Nobody has claimed this yet.
- Dominant language
- R
- Stars
- 4
- Forks
- 1
- PR merge metrics
- No merged PRs in 30d
Description
Add a function that when merging data will tell which variables make the join to expand.
Aka:
```r
a <- data.frame(a = 1:3, b = 2:4)
b <- data.frame(a = 1:5, b = 3)
ab <- merge(a, b, all = TRUE)
```
That it can explain why merge output ab is now 7 rows long: Which variables caused this on which rows of each?
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
Start by reproducing the supplied R example with merge(a, b, all = TRUE) and inspect the package for an existing entry point; no file or test is named in the issue. Define what the explanation should report for the seven-row result, including the variables and rows responsible, before determining how it should be tested.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- r
- Domain
- data
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100