Extract a single column
pull() is similar to $. It's mostly useful because it looks a little
nicer in pipes, it also works with remote data frames, and it can optionally
name the output.
pull(.data, var = -1, name = NULL, ...)
.data |
A data frame, data frame extension (e.g. a tibble), or a lazy data frame (e.g. from dbplyr or dtplyr). See Methods, below, for more details. |
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 locations). |
name |
An optional parameter that specifies the column to be used
as names for a named vector. Specified in a similar manner as |
... |
For use by methods. |
A vector the same size as .data.
This function is a generic, which means that packages can provide implementations (methods) for other classes. See the documentation of individual methods for extra arguments and differences in behaviour.
The following methods are currently available in loaded packages: no methods found.
mtcars %>% pull(-1)
mtcars %>% pull(1)
mtcars %>% pull(cyl)
# Also works for remote sources
if (requireNamespace("dbplyr", quietly = TRUE)) {
df <- dbplyr::memdb_frame(x = 1:10, y = 10:1, .name = "pull-ex")
df %>%
mutate(z = x * y) %>%
pull()
}
# Pull a named vector
starwars %>% pull(height, name)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.