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如何使用model.matrix生成一個看起來像這樣的矩陣?如何以特定方式製作model.matrix?
[,1] [,2] [,3] [,4] [,5] [,6]
[1,] 1 1 0 0 0 0
[2,] 1 2 0 0 0 0
[3,] 1 3 0 0 0 0
[4,] 0 0 1 1 0 0
[5,] 0 0 1 2 0 0
[6,] 0 0 1 3 0 0
[7,] 0 0 0 0 1 1
[8,] 0 0 0 0 1 2
[9,] 0 0 0 0 1 3
我通過
fit = lmer(Temp ~ 1 + (1 + Time|Id), data = Data)
getME(fit, name = c("Z"))
凡
Time = rep(1:3, 3)
和ID
Id = c(0L, cumsum(diff(Time) < 0))
這是接近我能得到生產的第一矩陣。
id = rep(c("a","b","c"),each = 3)
Z = model.matrix(~0+id)
[,1] [,2] [,3]
1 1 0 0
2 1 0 0
3 1 0 0
4 0 1 0
5 0 1 0
6 0 1 0
7 0 0 1
8 0 0 1
9 0 0 1
你能解釋第一個矩陣的元素嗎?我的意思是,讓你看起來像第一個矩陣的矩陣是微不足道的,但我懷疑它會是你想要的...... –