GLZ - Methods for Specifying Designs

The Statistica Generalized Linear/Nonlinear Models (GLZ) module (as well as the Statistica General Linear Models, General Regression Models, General Partial Least Squares Models, General Discriminant Analysis Models, and ANOVA modules) provides three alternate methods for specifying designs: via Analysis Wizards, Quick Specs dialog boxes, and Analysis Syntax. Even if you choose one of the first two user interface methods, you can always switch to the GLZ Analysis Syntax Editor where the GLZ syntax describing your current design (as specified via Analysis Wizards or Quick Specs dialog boxes) will be displayed for further editing, if desired; the GLZ Analysis Syntax Editor also provides options for saving the design syntax in a text file for repeated use.

Quick specs dialog

This user interface will present Quick Specs dialog boxes tailored to the specific design selected in the Type of analysis list on the GLZ Startup Panel - Advanced tab. For example, if you choose a Multiple regression design from the Advanced tab, the Quick Specs dialog box will provide options for selecting the dependent (response) variable and a list of continuous predictor variables (independent variables or covariates); if you select a Factorial ANOVA from the Advanced tab, the Quick Specs dialog box will provide options for selecting the dependent (response) variable and a list of categorical predictor variables (factors, or grouping variables), and so on. If you have some experience with using other Statistica modules, this user interface will appear most familiar to you.

Analysis Wizard. The simplest method for specifying designs is via the Analysis Wizard. If you select this Specification method on the GLZ Startup Panel - Advanced tab, Statistica will guide you through a series of dialog boxes for specifying the desired type of design. Via this user interface, you can specify any design.

Analysis syntax editor

This user interface is used to type in directly the command syntax for specifying any type of regression or experimental design using the GLZ syntax conventions in the GLZ Analysis Syntax Editor. The GLZ syntax conventions are essentially identical to the GLM syntax conventions (see the General Linear Model (GLM) module), with only a few additions and omissions relating to stepwise and best subset analyses, the specification of the link function and distribution, and computational details regarding the estimation procedure.

Specification methods and dialogs

For a detailed explanation of each method or dialog box, click on the links below.

GLZ Startup Panel - Advanced tab	GLZ Analysis Syntax Editor
Quick Specs dialog box	GLZ Syntax
Quick Specs - Quick tab	GLZ Syntax Examples
Quick Specs - Advanced tab
Between Effects dialog box