zs {MASSExtra} | R Documentation |
These functions are for use in fitting linear models (or allies) with scaled predictors, in such a way that when the fitted model objects are used for prediction (or visualisation) the same scaling parameters will be used with the new data.
zs(x)
zu(x)
zr(x)
zq(x)
x |
A numeric vector |
a standardised vector containing the parameters needed for use in prediction with new data
fm <- lm(Gas ~ Insul/zs(Temp), whiteside)
gm <- lm(Gas ~ Insul/zu(Temp), whiteside)
hm <- lm(Gas ~ Insul/Temp, whiteside)
c(fm = unname(predict(fm, data.frame(Insul = "Before", Temp = 0.0))),
gm = unname(predict(gm, data.frame(Insul = "Before", Temp = 0.0))),
hm = unname(predict(hm, data.frame(Insul = "Before", Temp = 0.0))))
rm(fm, gm, hm)