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Generate Factor Levels
Syntax
gl(n, k, length, labels=1:n, ordered=FALSE)
Value
This function generates factors by specifying the
pattern of their levels.
The result has levels from 1 to n
with each value replicated in groups of length
k out to a total length of length.
Labels for the resulting factor levels can be
optionally specified with the arguments labels
and the factor levels can be made ordered by
specifying ordered=TRUE.
gl is modelled on the GLIM function of the
same name.
Examples
<![CDATA[# 20 alternating 1s and 2s
gl(2, 1, 20)
# alternating pairs of 1s and 2s
gl(2, 2, 20)
]]>