tests/testthat/_snaps/group-by.md

In javifar/TIDYVERSE-DPLYR: A Grammar of Data Manipulation

select(group_by(.)) implicitely adds grouping variables (#170)

Code
  res <- mtcars %>% group_by(vs) %>% select(mpg)
Message <message>
  Adding missing grouping variables: `vs`

group_by works with zero-row data frames (#486)

Code
  x <- select(dfg, a)
Message <message>
  Adding missing grouping variables: `g`

group_by() and ungroup() give meaningful error messages

Code
  df %>% group_by(unknown)
Error <rlang_error>
  Must group by variables found in `.data`.
  x Column `unknown` is not found.

Code
  df %>% ungroup(x)
Error <rlib_error_dots_nonempty>
  `...` is not empty.
  i These dots only exist to allow future extensions and should be empty.
  x We detected these problematic arguments:
  * `..1`
  i Did you misspecify an argument?

Code
  df %>% group_by(x, y) %>% ungroup(z)
Error <vctrs_error_subscript_oob>
  Can't subset columns that don't exist.
  x Column `z` doesn't exist.

Code
  df %>% group_by(z = a + 1)
Error <rlang_error>
  Problem adding computed columns in `group_by()`.
  x Problem with `mutate()` column `z`.
  i `z = a + 1`.
  x object 'a' not found

javifar/TIDYVERSE-DPLYR documentation built on Dec. 20, 2021, 9:08 p.m.