# Charts

Available charts depend on the measurement level of the dependent variable, the growing method, and other settings.

**Independent variable importance to model.** Bar chart of
model importance by independent variable (predictor). Available only
with the CRT growing method.

Node Performance

**Gain.** Gain is the percentage of total cases in the target
category in each node, computed as: (node target *n* / total
target *n*) x 100. The gains chart is a line chart of cumulative
percentile gains, computed as: (cumulative percentile target *n* /
total target *n*) x 100. A separate line chart is produced for
each target category. Available only for categorical dependent variables
with defined target categories. See the topic Selecting Categories for
more information.

The gains chart plots the same values that you would see in the *Gain
Percent* column in the gains for percentiles table, which also
reports cumulative values.

Index. Index is the ratio of the node response percentage for the target category compared to the overall target category response percentage for the entire sample. The index chart is a line chart of cumulative percentile index values. Available only for categorical dependent variables. Cumulative percentile index is computed as: (cumulative percentile response percent / total response percent) x 100. A separate chart is produced for each target category, and target categories must be defined.

The index chart plots the same values that you would see in the *Index* column
in the gains for percentiles table.

Response. The percentage of cases in the node in the specified target category. The response
chart is a line chart of cumulative percentile response, computed
as: (cumulative percentile target *n* / cumulative percentile
total *n*) x 100. Available only for categorical dependent variables
with defined target categories.

The response chart plots the same values that you would see in
the *Response* column in the gains for percentiles table.

**Mean.** Line chart of cumulative percentile mean values for
the dependent variable. Available only for scale dependent variables.

**Average profit.** Line chart of cumulative average profit.
Available only for categorical dependent variables with defined profits.
See the topic Profits for
more information.

The average profit chart plots the same values that you would see
in the *Profit* column in the gain summary for percentiles table.

**Return on investment (ROI).** Line chart of cumulative ROI
(return on investment). ROI is computed as the ratio of profits to
expenses. Available only for categorical dependent variables with
defined profits.

The ROI chart plots the same values that you would see in the *ROI* column
in the gain summary for percentiles table.

**Percentile increment.** For all percentile charts, this setting
controls the percentile increments displayed on the chart: 1, 2, 5,
10, 20, or 25.

To Select Chart Output

This feature requires the Decision Trees option.

- From the menus choose:
- In the main Decision Tree dialog, click Output.
- Click the Plots tab.