plot.tree.sequence(x, ..., order="increasing")
"tree.sequence".
This is assumed to be the result of some function that produces
an object with the same named components (size, deviance, k)
as that returned by
prune.tree and
shrink.tree.
size on the plot.
Use
"decreasing" for the natural ordering of
k
and the amount of pruning. Only the first character is needed.
This function is a method for the generic function for class tree.sequence. It can be invoked by calling for an object x of the appropriate class, or directly by calling regardless of the class of the object.
z <- tree(Mileage ~ Weight, car.test.frame) zp <- prune.tree(z) plot(zp, type="s") # stairstep plot zs <- shrink.tree(z) lines(zs$size, zs$dev)