PPtreeregViz (version 2.0.5)

PPregNodeViz: Node visualization

Description

Visualize node in projection pursuit regression tree.

Usage

PPregNodeViz(PPTreeregOBJ,node.id,Rule=5)

Value

An object of the class ggplot

Arguments

PPTreeregOBJ

PPTreereg class object - a model to be explained

node.id

node ID of inner or final node

Rule

split rule 1: mean of two group means 2: weighted mean of two group means - weight with group size 3: weighted mean of two group means - weight with group sd 4: weighted mean of two group means - weight with group se 5: mean of two group medians 6: weighted mean of two group medians - weight with group size 7: weighted mean of two group median - weight with group IQR 8: weighted mean of two group median - weight with group IQR and group size

Details

This function is developed for the visualization of inner and final nodes. Visual representation of the projection coefficient value of each node and the result of projected data help understand growth process of the projection pursuit regression tree. For the inner node, two plots are provided - the bar chart style plot with projection pursuit coefficients of each variable, the histogram of the projected data. For the final node, scatter plot of observed Y vs. fitted Y according to the final rules.

Examples

data(dataXY)
Model <- PPTreereg(Y~., data = dataXY, DEPTH = 2)
PPregNodeViz(Model,node.id=1)
PPregNodeViz(Model,node.id=4)