h2o (version 2.8.4.4)

Revalue: Replace specified values with new values, in a factor or character vector.

Description

revalue If x is a factor, the named levels of the factor will be replaced with the new values.

Usage

revalue(x, replace = NULL, warn_missing = TRUE)

Arguments

x

factor or character vector to modify

replace

named character vector, with new values as values, and old values as names. If NULL, then no replacement is performed.

warn_missing

print a message if any of the old values are not actually present in x

Details

This function works only on character vectors and factors, but the related mapvalues function works on vectors of any type and factors, and instead of a named vector specifying the original and replacement values, it takes two separate vectors

Examples

library(h2o)
localH2O = h2o.init()
iris.hex <- as.h2o(localH2O, iris)

# display current factor levels
levels(iris.hex$Species)

revalue(iris.hex$Species, c(setosa = "A", versicolor = "B", virginica = "C"))

# display new levels
levels(iris.hex$Species)