[R-Forge #5754] GForce functions and row- + col-wise operations on .SD
Nobody has claimed this yet.
Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 25/100
Research direction
Review the GForce checklist and the stated lag(x, 1:2) example, using the linked R-Forge issue for any additional context. Define the scope of the unchecked operations and the required list-returning behavior before implementation; completion should cover the agreed items and match the example output.
Written by the indexing model from the issue text.
Description
Submitted by: Arun ; Assigned to: Nobody; R-Forge link
For GForce
- gsum, gmean
- .N
- gmin, max
- median
- head(.SD, 1), tail(.SD, 1), last(x)
-
[for length-1 subsets - gvar
- gsd
- gprod
- .SD[which.min()], .SD[which.max()]
- guniqueN
- gpaste??
- quantile
- covariance
- correlation
- kurtosis
- skewness
When GForce is upgraded to work with :=:
- cumulative functions
- rolling / window functions
Utility function
- lead, lag
It should return a list. That is,
x <- 1:5
lag(x, 1:2)
# [[1]]
# [1] NA 1 2 3 4
#
# [[2]]
# [1] NA NA 1 2 3
- Dominant language
- R
- Stars
- 3.9k
- Forks
- 1.1k
- Avg merge
- 14h 4m
- Merged PRs (30d)
- 4
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.
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