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2011 Dec 27
0
Using minsplit and unequal weights in rpart
...d(kyphosis, kyphosis, kyphosis) fitRepeated <- rpart(Kyphosis ~ Age + Number + Start, data=kyphosisRepeated, control=rpart.control(minsplit=45)) plot(fitRepeated) text(fitRepeated, use.n=TRUE) # instead of repeating, use weights kyphosisWeighted <- kyphosis kyphosisWeighted$myWeights <- 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...