- states <- as.data.frame(state.x77[,c("Murder", "Population","Illiteracy", "Income", "Frost")])
- library(car)
- boxTidwell(Murder~Population+Illiteracy,data=states)
- library(car)
- boxTidwell(Murder~Population+Illiteracy+Frost,data=states)
the variables to be transformed must have only positive values
我特意检查了一遍Frost的数据,没有发现负数啊,请问这种情况该怎么解决?


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