vctrs: new_data_frame – R documentation

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new_data_frame

Assemble attributes for data frame construction

Description

new_data_frame() constructs a new data frame from an existing list. It is meant to be performant, and does not check the inputs for correctness in any way. It is only safe to use after a call to df_list(), which collects and validates the columns used to construct the data frame.

Usage

new_data_frame(x = list(), n = NULL, ..., class = NULL)

Arguments

x

A named list of equal-length vectors. The lengths are not checked; it is responsibility of the caller to make sure they are equal.

n

Number of rows. If NULL, will be computed from the length of the first element of x.

..., class

Additional arguments for creating subclasses. The "names" and "row.names" attributes override input in x and n, respectively:

"names" is used if provided, overriding existing names in x
"row.names" is used if provided, if n is provided it must be consistent.

Examples

new_data_frame(list(x = 1:10, y = 10:1))

vctrs

Vector Helpers

v0.3.8

MIT + file LICENSE

Authors

Hadley Wickham [aut], Lionel Henry [aut, cre], Davis Vaughan [aut], data.table team [cph] (Radix sort based on data.table's forder() and their contribution to R's order()), RStudio [cph]

Initial release