# group_map() give meaningful errors Code (expect_error(mtcars %>% group_by(cyl) %>% group_modify(~ data.frame(cyl = 19))) ) Output <error/rlang_error> Error in `group_modify()`: ! The returned data frame cannot contain the original grouping variables: cyl. Code (expect_error(mtcars %>% group_by(cyl) %>% group_modify(~10))) Output <error/rlang_error> Error in `group_modify()`: ! The result of `.f` must be a data frame. Code (expect_error(iris %>% group_by(Species) %>% group_modify(head1))) Output <error/rlang_error> Error in `group_modify()`: ! `.f` must accept at least two arguments. i You can use `...` to absorb unused components. Code (expect_error(iris %>% group_by(Species) %>% group_map(head1))) Output <error/rlang_error> Error in `group_map()`: ! `.f` must accept at least two arguments. i You can use `...` to absorb unused components.
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