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.
# S3 method for class 'dtplyr_step'
nest(.data, ..., .names_sep = NULL, .key = deprecated())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.
If NULL, the default, the inner names will come from
the former outer names. If a string, the new inner names will use the
outer names with names_sep automatically stripped. This makes
names_sep roughly symmetric between nesting and unnesting.
Not supported.
A lazy_dt().
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()
}
#> Source: local data table [2 x 2]
#> Groups: x
#> Call: `_DT25`[, .(data = .(.SD)), by = .(x)]
#>
#> x data
#> <dbl> <list>
#> 1 1 <dt [2 × 1]>
#> 2 2 <dt [1 × 1]>
#>
#> # Use as.data.table()/as.data.frame()/as_tibble() to access results