General CHAID Models Startup Panel and Quick Tab

Ribbon bar. Select the Data Mining tab. In the Trees/Partitioning group, click CHAID to display the General CHAID Models Startup Panel.

Classic menus. On the Data Mining menu, select General CHAID Models to display the General CHAID Models Startup Panel.

The Startup Panel contains one tab: Quick.

Note: Missing data. Missing data in predictor variables in the General CHAID (GCHAID) Models and General Classification and Regression Trees (GC&RT) modules are handled differently from the Interactive Trees module. Because the Interactive Trees  module does not support ANCOVA-like design matrices, it is more flexible in the handling of missing data. Refer to Missing Data in GC&RT, GCHAID, and Interactive Trees for additional details.

See also the General CHAID Models Index, Overviews, and Example.

Element Name Description
Type of analysis From the Type of analysis list, select Standard CHAID or CHAID with coded design.
Standard CHAID Selecting Standard CHAID will treat categorical and continuous predictors as single-column predictor variables, and no recoding on those variables will be performed.
CHAID with coded design Select CHAID with coded design to analyze ANCOVA-like predictor designs for continuous and categorical predictors (see also Analyzing ANCOVA-like designs).
Specification method The Specification method list presents the three alternative user interfaces: Quick specs dialog, Analysis Wizard, and Analysis syntax editor. The Analysis Wizard and Analysis syntax editor options are only available for CHAID with coded design.
Note: the Analysis Wizard and Analysis syntax editor are identical to those used in GLM, GRM, GLZ, GDA, PLS, GC&RT (a comprehensive description of the analysis syntax for specifying ANOVA/ANCOVA-like designs is presented in the context of GLM). Hence, a great advantage of this method for analyzing data is that identical predictor designs can be applied using these very different methods for analyzing regression-type problems [e.g., via General Linear Models (GLM), various Generalized Linear Models (GLZ), Partial Least Squares (PLS) methods, or General Classification and Regression Trees (GC&RT)] or classification-type problems (e.g., via General Classification and Regression Trees (GC&RT), General Discriminant Analysis (GDA) models, or applicable Generalized Linear Models (GLZ)).
Quick specs dialog Irrespective of the type of analysis selected, the Quick Specs dialog will prompt you to select the (categorical or continuous) dependent variable, response codes (if the dependent variable is categorical in nature, and you are analyzing a classification problem), Count variable (optional), categorical factors, continuous predictors, factor codes, and other options. If you chose option CHAID with coded design you can also specify an ANOVA/ANCOVA-like design or model  to apply to the predictor variables in the analyses. In the General CHAID Models Quick specs dialog box, the Options button can be used to modify various computational details, while the Syntax editor button can be used to further customize the analysis.
Analysis Wizard Select Analysis Wizard to step through a sequence of dialogs that will guide you through the specifications for an analysis. At the conclusion of the sequence of dialogs, you can either click the OK (Run) button to compute the results or choose the Next> button to display the General CHAID Trees Wizard - Extended Options dialog box to further customize the analysis by clicking the Syntax editor button. The Syntax editor button also allows you to open an existing file with command syntax, or save current syntax in a file for future repetitive use. Note that selecting the  Analysis Wizard automatically moves the Type of analysis selection to CHAID with coded design.
Analysis syntax editor Select Analysis syntax editor to specify the analysis via the General CHAID Analysis Syntax Editor, which will provide you with various options for specifying designs and for modifying various parameters of the computational procedures. You can also open an existing text file with command syntax, or save syntax in a file for future repetitive use. Refer to the description of GCHAID syntax for additional details. Note that selecting the Analysis syntax editor automatically moves the Type of analysis selection to CHAID with coded design.
OK Click this button to display the respective dialog box corresponding to the option selected on the Quick tab..
Cancel Click this button to close the Startup Panel without performing an analysis.
Options See Options Menu for descriptions of the commands on this menu.
Open Data Click this button to display the Select Data Source dialog box, which contains options to choose the spreadsheet on which to perform the analysis. The Select Data Source dialog box contains a list of the spreadsheets that are currently active.
Select Cases Click this button to display the Analysis/Graph Case Selection Conditions dialog box, which contains options to create conditions for which cases will be included (or excluded) in the current analysis. More information is available in the case selection conditions overview, syntax summary, and dialog description.
W Click this button to display the Analysis/Graph Case Weights dialog box, which contains options to adjust the contribution of individual cases to the outcome of the current analysis by "weighting" those cases in proportion to the values of a selected variable.