I have data that looks like this
我有这样的数据
climate <- c("Dry","Wet","Dry","Wet","Dry","Wet","Dry","Wet")
place <- c("Urban", "Urban","Urban","Urban","Rural","Rural","Rural","Rural")
control <- c(4,5,1,0,0,5,6,7)
treatment <- c(1,2,3,0,1,9,9,1)
dat01 <- data.frame(climate, place, control, treatment)
c