tinylens (version 0.1.0)

filter_il: Filter ilens

Description

This function returns an illegal lens that filters according to the specified conditions.

Usage

filter_il(...)

Value

A lens that filters the specified rows

Arguments

...

Conditions to filter by

Details

Conditions are evaluated in the context of the data frame.

Examples

d <- data.frame(x = 1:10, y = 11:20, z = 21:30)
l <- filter_il(x > 5)
# get the rows where x is greater than 5
view(d, l)
# set the rows where x is greater than 5 to 8
set(d, l, 8)
# set y value to 8 where x is greater than 5
set(d, l %.% select_l(y), 8)