Hi all,
Can anyone who is familar with CART tell me what I missed in my tree code?
library (MASS)
myfit <- tree (y ~ x1 + x2 + x3 + x4 )
# tree.screens () # useless
plot(myfit); text (myfit, all= TRUE, cex=0.5, pretty=0)
# tile.tree (myfit, fgl$type) # useless
# close.screen (all= TRUE) # useless
My current tree plot resulted from above code shows as:
1. overlapped #s caused by unsuitable length of branch.
2. no misclassification rates: 'misclass.tree' only brings up the error of '
misclassification error rate is appropriate for factor responses only', but my
response y is 0/1 data.
3. Unsuitable location of notations: there are not two notation of splitting
criteria on the two branches when a node is split, instead only one notation of
splitting criteria is on the node location.
thanks,
xiao yue
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