issues with invisible functions in `j-expression`
Nobody has claimed this yet.
Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 35/100
Research direction
Start with the reproducible R examples in the issue, comparing boxplot(dt$a) with dt[, boxplot(a)] and the parenthesized form mentioned in the report. Inspect how j-expression evaluation handles boxplot's returned components, and review related issue #482. Done means the data.table expression plots successfully and preserves the expected output without the reported errors.
Written by the indexing model from the issue text.
Description
dt = data.table(a = 1:5)
# all is well
boxplot(dt$a)
# lots of errors
dt[, boxplot(a)]
#Error in data.table(stats = c(1, 2, 3, 4, 5), n = 5, conf = c(1.58680503822013, :
# Item 4 has no length. Provide at least one item (such as NA, NA_integer_ etc) to be repeated to #match the 5 rows in the longest column. Or, all columns can be 0 length, for insert()ing rows into.
#In addition: Warning message:
#In data.table(stats = c(1, 2, 3, 4, 5), n = 5, conf = c(1.58680503822013, :
# Item 3 is of size 2 but maximum size is 5 (recycled leaving remainder of 1 items)
Related to #482. Iirc it used to plot and output all the stuff you get if you do (boxplot(dt$a)), but now it's not working at all.
- 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.
More from Rdatatable/data.table
-
as.data.table() recurses without end on a survival::Surv object (or any data.frame carrying one) Open
Difficulty 2/5 1-3 hours Newbie friendliness 88/100
Rdatatable/data.table#7887 ·
-
consistency tests
Difficulty 2/5 1-3 hours Newbie friendliness 68/100
Rdatatable/data.table#7853 · 3 comments ·
-
internals
Difficulty 2/5 1-3 hours Newbie friendliness 65/100
Rdatatable/data.table#6938 · 1 comment ·
-
encoding fread
Difficulty 2/5 1-3 hours Newbie friendliness 65/100
Rdatatable/data.table#5179 · 8 comments ·
-
documentation programming
Difficulty 2/5 1-3 hours Newbie friendliness 68/100
Rdatatable/data.table#3199 · 3 comments ·
All issues in Rdatatable/data.table
Similar issues
-
Difficulty 2/5 1-3 hours Newbie friendliness 82/100
r-lib/pkgdepends#485 · 3 comments ·
-
Difficulty 1/5 Under an hour Newbie friendliness 92/100
-
beginners blocker
Difficulty 2/5 1-3 hours Newbie friendliness 78/100
-
enviPathR OpenBuild Error Build OK Build Warning policies-accepted pre-review precheck-passed
Difficulty 1/5 Under an hour Newbie friendliness 84/100
Bioconductor/BiocContributions#207 · 6 comments ·
-
Difficulty 2/5 1-3 hours Newbie friendliness 74/100
datacarpentry/semester-biology#1255 ·