Modeling and Multivariate Methods - SAS

326 Recursively Partitioning Data Chapter 13
Partition Method
Show Split Bar shows or hides the colored bars showing the split proportions in each leaf. This is for
categorical responses only.
Show Split Stats shows or hides the split statistics. See “Statistical Details” on page 348 for more
information on the categorical split statistic G 2 .
Show Split Prob shows or hides the Rate and Prob statistics. This is for categorical responses only.
JMP automatically shows the Rate and Prob statistics when you select Show Split Count. See
“Statistical Details” on page 348 for more information on Rate and Prob.
Show Split Count shows or hides each frequency level for all nodes in the tree. This is for categorical
responses only.
When you select this option, JMP automatically selects Show Split Prob. And when you deselect Show
Split Prob, the counts do not appear.
Show Split Candidates shows or hides the Candidates report.
Sort Split Candidates sorts the candidates report by the statistic or the log(worth), whichever is
appropriate. This option can be turned on and off. When off, it doesn’t change any reports, but new
candidate reports are sorted in the order the X terms are specified, rather than by a statistic.
Split Best
splits the tree at the optimal split point. This is the same action as the Split button.
Prune Worst removes the terminal split that has the least discrimination ability. This is equivalent to
hitting the Prune Button.
Minimum Size Split presents a dialog box where you enter a number or a fractional portion of the total
sample size which becomes the minimum size split allowed. The default is 5. To specify a fraction of the
sample size, enter a value less than 1. To specify an actual number, enter a value greater than or equal to
1.
Lock Columns reveals a check box table to allow you to interactively lock columns so that they are not
considered for splitting. You can toggle the display without affecting the individual locks.
Plot Actual by Predicted
responses only.
produces a plot of actual values by predicted values. This is for continuous
Small Tree View
displays a smaller version of the partition tree to the right of the scatterplot.
Tree 3D Shows or hides a 3D plot of the tree structure. To access this option, hold down the Shift key and
click the red-triangle menu.
Leaf Report
gives the mean and count or rates for the bottom-level leaves of the report.
Column Contributions brings up a report showing how each input column contributed to the fit,
including how many times it was split and the total G 2 or Sum of Squares attributed to that column.
Split History shows a plot of R 2 vs. the number of splits. If you use validation, separate curves are drawn
for training and validation R 2 .