集的均值和方差的数据集我有此数据集structure(list(Color = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L), .Label = c("blue", "green", "red" ), class = "factor")), .Names = "Color", row.names = c(NA, -30L ), class = "data.frame")
生成基于彩色
我想补充指派为5的平均值和2于蓝色的方差,10的平均柱并且方差4到绿色,平均值100和方差15到红色。
是否回答帮助? –