Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

better error message for missing j in cube #4282

Merged
merged 4 commits into from
Apr 15, 2021
Merged

better error message for missing j in cube #4282

Show file tree
Hide file tree
Changes from 2 commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
c282ec4
better error message for missing j in cube
MichaelChirico Mar 6, 2020
4e29ada
fixed, thanks jan
MichaelChirico Mar 7, 2020
4e88b47
Merge branch 'master' into cube-missing-j
mattdowle Apr 15, 2021
1e9c8ec
news item: move subject (cube) to be first word
mattdowle Apr 15, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 2 additions & 0 deletions NEWS.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -145,6 +145,8 @@ unit = "s")

7. Added more explanation/examples to `?data.table` for how to use `.BY`, [#1363](https://github.com/Rdatatable/data.table/issues/1363).

8. The `data.table` method for `cube` catches a missing `j` argument earlier to give friendlier output.


# data.table [v1.12.8](https://github.com/Rdatatable/data.table/milestone/15?closed=1) (09 Dec 2019)

Expand Down
4 changes: 3 additions & 1 deletion R/groupingsets.R
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -27,10 +27,12 @@ cube.data.table = function(x, j, by, .SDcols, id = FALSE, ...) {
stop("Argument 'by' must be a character vector of column names used in grouping.")
if (!is.logical(id))
stop("Argument 'id' must be a logical scalar.")
if (missing(j))
stop("Argument 'j' is required")
# generate grouping sets for cube - power set: http://stackoverflow.com/a/32187892/2490497
n = length(by)
keepBool = sapply(2L^(seq_len(n)-1L), function(k) rep(c(FALSE, TRUE), times=k, each=((2L^n)/(2L*k))))
sets = lapply((2L^n):1L, function(j) by[keepBool[j, ]])
sets = lapply((2L^n):1L, function(jj) by[keepBool[jj, ]])
# redirect to workhorse function
jj = substitute(j)
groupingsets.data.table(x, by=by, sets=sets, .SDcols=.SDcols, id=id, jj=jj)
Expand Down
4 changes: 4 additions & 0 deletions inst/tests/tests.Rraw
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -16846,3 +16846,7 @@ A = data.table(A=c(complex(real = 1:3, imaginary=c(0, -1, 1)), NaN))
test(2138.3, rbind(A,B), data.table(A=c(as.character(A$A), B$A)))
A = data.table(A=as.complex(rep(NA, 5)))
test(2138.4, rbind(A,B), data.table(A=c(as.character(A$A), B$A)))

# missing j was only caught in groupingsets, leading to unexpected error message
DT = data.table(a = 1)
test(2139, cube(DT, by = 'a'), error = "Argument 'j' is required")