cat.factor: Combine Several Factors

Description

Combine (concatenate) several factor objects, to produce a factor.

Usage

cat.factor(…)

Arguments

…

Any number of arguments. Each argument should be a factor, or will be converted to a factor.

Value

A factor, whose length is the sum of the lengths of all arguments. The levels of the resulting factor are the union of the levels of the arguments.

Details

The arguments … are concatenated as they would be using c() or cat(), except that factor levels are retained and merged correctly. See the Examples.

Examples

Run this code

# NOT RUN {
   f <- factor(letters[1:3])
   g <- factor(letters[3:5])
   f
   g
   cat(f,g)
   c(f,g)
   cat.factor(f, g)
# }