Dear R community
I have a question regarding the value of cost complexity parameter "k" used in
"tree" package for pruning purpose. Any help in finding the optimum value of
"k" is requested. Please give some suggestion in this regard. In the example
below i used k=0 but i don't know why? But if i use k=NULL, then it will not
plot the resultant tree.
library(tree)
ds=iris; iris=transform(iris, Species = factor(Species, labels = letters[1:3]))
miris <- tree(Species ~ ., data = iris, control=tree.control(nobs = 150,
minsize = 5, mincut = 2)); iris.prun=prune.tree(miris, method=c("misclass"),
best = NULL, k=0); iris.prun; summary(iris.prun); plot(iris.prun)
best regards
Muhammad Azam
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