gl()所属R语言包:base ;Generate Factor Levels,生成因子水平
Generate factors by specifying the pattern of their levels.
通过指定水平的格局产生的因素。
用法----------Usage----------
gl(n, k, length = n*k, labels = 1:n, ordered = FALSE)
参数:n
an integer giving the number of levels.
整数的级别(因子)数。
参数:k
an integer giving the number of replications.
一个整数,重复数。
参数:length
an integer giving the length of the result.
一个整数,结果的长度。
参数:labels
an optional vector of labels for the resulting factor levels.
可选的向量因子水平的标签。
参数:ordered
a logical indicating whether the result should be ordered or not.
一个逻辑表明是否排序
返回值为 因子长度从1到n,k为length组复制的每个值。
## First control, then treatment: gl(2, 8, labels = c("Control", "Treat")) ## 20 alternating 1s and 2s gl(2, 1, 20) ## alternating pairs of 1s and 2s gl(2, 2, 20)