filter.dtplyr_step {dtplyr}

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))