Convert a factor with numeric labels into a numeric vector

Converting a factor with as.numeric() returns the underlying integer codes, not the labels, which is rarely what you want when the labels are themselves numbers. f.as.numeric() returns the labels as numbers instead.

Usage

f.as.numeric(x)

Arguments

x

a factor with numeric labels

Value

A numeric vector of the factor's labels.

Author

Ulrike Grömping, groemping@beuth-hochschule.de

Ben Wiseman, benjamin.h.wiseman@gmail.com

Examples

x <- factor(c(11, 22, 33, 99))

as.numeric(x)
#> [1] 1 2 3 4
# 1 2 3 4      # the integer codes - NOT usually what you want

f.as.numeric(x)
#> [1] 11 22 33 99
# 11 22 33 99  # the labels as numbers - usually what you want

# equivalent to the clunkier base idiom:
as.numeric(as.character(x))
#> [1] 11 22 33 99