meanvar.itree {itree} | R Documentation |
Creates a plot on the current graphics device of the deviance of the
node divided by the number of observations at the node. Also returns
the node number. Same as meanvar.rpart
, but implements checks so that
a warning/error is printed when called on an object where deviance
doesn't have the appropriate meaning.
meanvar(tree, ...) ## S3 method for class 'itree' meanvar(tree, xlab="ave(y)", ylab="ave(deviance)", ...)
tree |
fitted model object of class |
xlab |
x-axis label for the plot. |
ylab |
y-axis label for the plot. |
... |
additional graphical parameters may be supplied as arguments to this function. |
an invisible list containing the following vectors is returned.
x |
fitted value at terminal nodes ( |
y |
deviance of node divided by number of observations at node. |
label |
node number. |
a plot is put on the current graphics device.
#the rpart package's example: z.auto <- itree(Mileage ~ Weight, car.test.frame) meanvar(z.auto, log='xy')