To create a correlation interaction view, in the Project Viewer Window double-click on a previously created Multitree Model to open the file. (To generate a random tree or multitree model see Chapter 9).

Figure 13.1: View of Random Tree or Multitree Model file window

13.1.1 Pick Wanted Variables

From the Multitree Model viewer click on the Variable List tab at the bottom of the tree list. If you wish to sort the variables, click on the Variable Name column header/button. This will sort smallest to largest. Click a second time to reverse the sort. This makes the variables easier to find when charted, if you have a larger number of variables.

Select the variables you wish to show in the Correlation Interaction View. Use the mouse with the Ctrl key to select or de-select individual variables. Click and Shift+Click work well to define contiguous groups. Figure 13.2 gives a file view with all variables selected.

Figure 13.2: Window showing all the variables selected

When you have selected what you want charted, click the Correlation/Interaction View icon or click on the menus Variables->View Correlation Interaction Chart.