ffifelse: Conditional Element Selection for 'ff' vectors.

In ffbase: Basic Statistical Functions for Package 'ff'

Description

Similar as ifelse in the base package but only works with yes and no as ff vectors.

Usage

ffifelse(test, yes, no)

Arguments

test	logical or boolean ff vector
yes	an ff vector with return values for true elements of test. If too short, their elements are recycled.
no	an ff vector with return values for false elements of test. If too short, their elements are recycled.

Value

An ff vector of the same length as test.

See Also

ifelse

Examples

data(iris)
ffiris <- as.ffdf(iris)
ffifelse(ffiris$Sepal.Length < 5, TRUE, NA)
ffifelse(ffiris$Sepal.Length < 5, factor(rep("abc", nrow(ffiris))), NA)
ffifelse(ffiris$Sepal.Length < 5, Sys.Date(), factor("abc"))
ffifelse( ffiris$Sepal.Length < 5, Sys.Date(), ff(seq.Date( Sys.Date()+1
        , Sys.Date()+nrow(ffiris), by = "day")))

ffbase documentation built on Feb. 27, 2021, 5:06 p.m.