conTree (version 0.3-1)

lofcurve: Produce lack-of-fit curve for a contrast tree

Description

Produce lack-of-fit curve for a contrast tree

Usage

lofcurve(
  tree,
  x,
  y,
  z,
  w = rep(1, length(y)),
  doplot = "first",
  col = "black",
  ylim = NULL
)

Value

a named list of plotted x and y points

Arguments

tree

model object output from contrast() or prune()

x

training input predictor data matrix or data frame in same format as in contrast()

y

vector, or matrix containing training data input outcome values or censoring intervals for each observation in same format as in contrast()

z

vector containing values of a second contrasting quantity for each observation in same observation format as in contrast ()

w

observation weights

doplot

logical flag. doplot="first" implies start new display. doplot="next" implies super impose plot on existing display. doplot="none" implies no plot displayed.

col

color of plotted curve

ylim

y-axis limit