R: Nest

nest.dtplyr_step {dtplyr}

R Documentation

Nest

Description

This is a method for the tidyr tidyr::nest() generic. It is translated using the non-nested variables in the by argument and .SD in the j argument.

Usage

## S3 method for class 'dtplyr_step'
nest(.data, ..., .names_sep = NULL, .key = deprecated())

Arguments

`.data`	A data frame.
`...`	<`tidy-select`> Columns to nest, specified using name-variable pairs of the form `new_col = c(col1, col2, col3)`. The right hand side can be any valid tidy select expression.
`.names_sep`	If `NULL`, the default, the names will be left as is. In `nest()`, inner names will come from the former outer names; in `unnest()`, the new outer names will come from the inner names. If a string, the inner and outer names will be used together. In `unnest()`, the names of the new outer columns will be formed by pasting together the outer and the inner column names, separated by `names_sep`. In `nest()`, the new inner names will have the outer names + `names_sep` automatically stripped. This makes `names_sep` roughly symmetric between nesting and unnesting.
`.key`	Not supported.
`data`	A `lazy_dt()`.

Examples

if (require("tidyr", quietly = TRUE)) {
  dt <- lazy_dt(tibble(x = c(1, 2, 1), y = c("a", "a", "b")))
  dt %>% nest(data = y)

  dt %>% dplyr::group_by(x) %>% nest()
}

[Package dtplyr version 1.2.2 Index]