gl {base} | R Documentation |
gl(n, k, length = n*k, labels=1:n, ordered=FALSE)
This function generates factor
s 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.
the underlying factor(.)
.
# First control, then treatment: gl(2,8, label=c("Ctnrl","Treat")) # 20 alternating 1s and 2s gl(2, 1, 20) # alternating pairs of 1s and 2s gl(2, 2, 20)