set_cols: Internally looped 'set()'

In coletl/coler: Convenience functions and personal templates

Description

A convenience function implementing set looped over columns of a data.frame. Modification is fast (by reference) but cannot include grouping operations.

Usage

set_cols(x, FUN, i = NULL, j = NULL)

Arguments

x	a data.frame.
FUN	a function to be applied to all x[i, j].
i	integer indices indicating rows to update.
j	column names or integer indices indicating columns to update. The default updates all columns.

See Also

:=.

Examples

df <- data.frame(a = letters, b = LETTERS, c = LETTERS,
                 stringsAsFactors = FALSE)
set_cols(df, FUN = tolower)

coletl/coler documentation built on May 12, 2021, 9:44 p.m.