filter.dtplyr_step {dtplyr} | R Documentation |
Subset rows using column values
Description
This is a method for the dplyr arrange()
generic. It is translated to
the i
argument of [.data.table
Usage
## S3 method for class 'dtplyr_step'
filter(.data, ..., .by = NULL, .preserve = FALSE)
Arguments
.data |
A lazy_dt() .
|
... |
<data-masking > Expressions that return a
logical value, and are defined in terms of the variables in .data .
If multiple expressions are included, they are combined with the & operator.
Only rows for which all conditions evaluate to TRUE are kept.
|
.by |
<tidy-select > Optionally, a selection of columns to
group by for just this operation, functioning as an alternative to group_by() . For
details and examples, see ?dplyr_by.
|
.preserve |
Ignored
|
Examples
library(dplyr, warn.conflicts = FALSE)
dt <- lazy_dt(mtcars)
dt %>% filter(cyl == 4)
dt %>% filter(vs, am)
dt %>%
group_by(cyl) %>%
filter(mpg > mean(mpg))
[Package
dtplyr version 1.3.1
Index]