PLOT Subcommand (TREE command)
The PLOT
subcommand
generates charts that may help you evaluate your tree model. The
subcommand name is followed by an equals sign (=) and any or all of
the following chart types:
GAIN. Line chart
of percentage gain. The chart shows percentage gain for
each target category of the dependent variable. GAIN
is available only for categorical dependent variables
with target categories defined on the DEPCATEGORIES
subcommand.
RESPONSE. Line chart
of response. The chart shows percentage of responses for
each target category of the dependent variable. RESPONSE
is available only for categorical dependent
variables with target categories defined on the DEPCATEGORIES
subcommand.
INDEX. Line chart
of index percent. The chart shows index percent (lift). INDEX
is available only for categorical
dependent variables with target categories defined on the DEPCATEGORIES
subcommand.
MEAN. Line chart of mean value for scale dependent variables. If the dependent variable is categorical, this keyword is ignored and a warning is issued.
PROFIT. Line chart of average profit for categorical dependent variables. If profits are not defined or the dependent variable is scale, this keyword is ignored and a warning is issued. See the topic PROFITS Subcommand (TREE command) for more information.
ROI. Line chart of ROI (return on investment). ROI is computed as the ratio of profits to expenses. If profits are not defined or the dependent variable is scale, this keyword is ignored and a warning is issued.
IMPORTANCE. Bar chart
of model importance by predictor. IMPORTANCE
is available for CRT models only; otherwise
the keyword is ignored and a warning is issued.
Example
TREE risk [o] BY income age creditscore
/METHOD TYPE=CRT
/DEPCATEGORIES TARGET=[1]
/PLOT=IMPORTANCE GAIN INDEX INCREMENT=5.
INCREMENT Keyword
The INCREMENT
keyword controls the width of percentile group charts.
- The keyword is followed by an equals sign (=) and one of the following values: 1, 2, 5, 10, 20, or 25. If a different value is specified a warning is issued and the default increment is used.
-
INCREMENT
is ignored for the predictor importance chart.