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]