preserve: preserve a data set before modification
In genvar: An Imperative Library for Data Manipulation

preserve a data set before modification

1	preserve(data = NULL)

data

a data set to preserve

a value that can be passed to restore to restore the data set later

require(stats)
use(cars, clear=TRUE)
p <- preserve()
collapse("mean(dist)", "speed")
list()
restore(p, replace=TRUE)
list()

genvar documentation built on Jan. 21, 2020, 9:07 a.m.

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