gl
Generate Patterned Factor
Description
Makes a factor with a simple, repetitive pattern of levels.
Usage
gl(n, k, length = n * k, labels = 1:n, ordered = FALSE)
Arguments
| n |
the number of blocks.
|
| k |
the number of repetitions of each level per block.
|
| length |
the length of the output. Usually, this value is a multiple of
n*k; otherwise, the factor ends with a partial block.
|
| labels |
a vector of names for the blocks. This is typically of length n,
but may be longer. It is allowed to be shorter, but that results in
missing values in the output.
|
| ordered |
a logical value. If TRUE, it returns an ordered factor.
If FALSE (the default), it returns a factor.
|
Value
A factor with n levels.
Each n*k block has k repetitions of the first level,
then k repetitions of the second level, and so on. This block
is repeated to give the requested output length.
If ordered is TRUE, gl returns an ordered factor.
See Also
Examples
gl(3,4,labels=LETTERS[1:3])
# A A A A B B B B C C C C
# Levels: A B C
gl(3,1,9,labels=c("how", "are", "you"), ordered = TRUE)
# [1] how are you how are you how are you
# Levels: how < are < you