vars_pull {tidyselect} | R Documentation |
This function powers dplyr::pull()
and various functions of the
tidyr package. It is similar to vars_select()
but returns only
one column name and has slightly different semantics: it allows
negative numbers to select columns from the end.
vars_pull(vars, var = -1)
var |
A variable specified as:
The default returns the last column (on the assumption that's the column you've created most recently). This argument is taken by expression and supports quasiquotation (you can unquote column names and column positions). |
The selected column name as an unnamed string.
# It takes its argument by expression: vars_pull(letters, c) # Negative numbers select from the end: vars_pull(letters, -3) # You can unquote variables: var <- 10 vars_pull(letters, !! var)