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kyphosisunevenweights
2011 Dec 27
0
Using minsplit and unequal weights in rpart
...ghts <- 3
fitWeighted <- rpart(Kyphosis ~ Age + Number + Start,
data=kyphosisWeighted, weights=myWeights,
control=rpart.control(minsplit=15)) ## minsplit has to be
adjusted for weights...
plot(fitWeighted)
text(fitWeighted, use.n=TRUE)
# uneven weights don't works the same way
kyphosisUnevenWeights <- rbind(kyphosis, kyphosis)
kyphosisUnevenWeights$myWeights <- c(rep(1,length.out=nrow(kyphosis)),
rep(2,length.out=nrow(kyphosis)))
fitUneven15 <- rpart(Kyphosis ~ Age + Number + Start,
data=kyphosisUnevenWeights, weights=myWeights,
control=rpart.control(minsplit=15))
plot(fitUneve...