| treeSummary {splinetree} | R Documentation |
Returns the tree frame.
Description
Provides a similar output to model$frame, but with the redundant information of yval and yval2 removed. Also omits the deviance, the complexity, and the weight. Useful for viewing node numbers and for extracting coefficients for a given node.
Usage
treeSummary(model)
Arguments
model |
A model built with splineTree() |
Value
A dataframe. The number of rows is the same as the number of nodes in the tree. The row names display the node labels of each node. The "var" attribute either displays the split variable selected at each node, or <leaf> if this node is a terminal node. The "n" attribute displays the number of individuals in the node. The "dev" attribute reports the projected sum of squares at this node; terminal nodes have the smallest values for "dev" because this is what the tree building process is supposed to minimize. The "coeffs" attribute displays the coefficients predicted for each node.
Examples
nlsySubset <- nlsySample[nlsySample$ID %in% sample(unique(nlsySample$ID), 400),]
split_formula <- ~HISP + WHITE + BLACK + SEX + Num_sibs + HGC_FATHER + HGC_MOTHER
tree <- splineTree(split_formula, BMI~AGE, idvar = "ID",
data = nlsySubset, degree = 1, df = 3,
intercept = TRUE, cp = 0.005)
treeSummary(tree)