Summarize contrast tree
Show graphical terminal node summaries
nodesum(tree, x, y, z, w = rep(1, nrow(x)), doplot = FALSE)nodeplots(
tree,
x,
y,
z,
w = rep(1, nrow(x)),
nodes = NULL,
xlim = NULL,
ylim = NULL,
pts = "FALSE",
span = 0.15
)
a named list of four items:
nodes the tree terminal node identifiers
cri the terminal node criterion values (depends on contrast type see above)
wt sum of weights in each terminal node
avecri weighted criterion average over all terminal nodes
model object output from contrast() or prune()
training input predictor data matrix or data frame in same format as in contrast()
vector, or matrix containing training data input outcome values or censoring intervals for each observation in same format as in contrast()
vector containing values of a second contrasting quantity for each observation in same observation format as in contrast()
observation weights
a flag to display/not display plots of output quantities
selected tree terminal node identifiers. Default is all terminal nodes
x-axis limit
y-axis limit
logical flag indicating whether to show y-values as circles/points (type = 'pp' only)
running median smoother span (type = 'diff' only)
The graphical representations of terminal node contrasts depend on the tree type
graphical representations of terminal node contrasts depending on tree type
-type = 'dist' implies CDFs of y and z in each terminal node. (Only top nine nodes are shown). Note that y can be censored (see above)
-type = 'diff' implies plot y versus z in each terminal node. (Only top nine nodes are shown).
-type = 'class' implies barplot of misclassification risk (upper) amd total weight (lower) in each terminal node
-type = 'prob' implies upper barplot contrasting empirical (blue) and predicted (red) \(p(y=1)\) in each terminal node. Lower barplot showing total weight in each terminal node.
type = 'quant' => upper barplot of fraction of y-values greater than or equal to corresponding z-values (quantile prediction) in each terminal node. Horizontal line reflects specified target quantile. Lower barplot showing total weight in each terminal node.
type = 'diffmean' or type = 'maxmean' implies upper barplot contrasting y-mean (blue) and z-mean (red) in each terminal node. Lower barplot showing total weight in each terminal node.
contrast()