Workspace Node: Generalized Cluster Analysis - Specifications - Quick Tab

The Generalized Cluster Analysis workspace node can be accessed from the Feature Finder, the ribbon bar, or the Node Browser. The Specifications - Quick tab is displayed by default when you open the specifications dialog box.

Element Name Description
Variables Click this button to display a variable selection dialog box. Select one or more categorical variables and/or one or more continuous variables for the analysis. Quick.
Algorithm Select either the k-Means or EM algorithm; refer to the Introductory Overview for a discussion of these methods.
Number of clusters Specify the Number of clusters; you can also determine the number of clusters automatically from the data by using any of the cross-validation methods available on the Validation tab (see also the section on v-fold cross-validation in the Introductory Overview for details). If either v-fold cross-validation is specified or a Test sample variable and code is specified on the Validation tab, this option is not available (it will be dimmed since the number of clusters will be determined automatically from the data).
Number of iterations Specify the maximum number of iterations to be performed during the clustering. The default value, 50, is usually sufficient even for large data sets and many clusters.
MD casewise deletion Missing data can be deleted Casewise or included in the analyses. If this check box is not selected, the k-Means algorithm will compute cluster assignments based on the observed data only, and the EM algorithm will compute cluster weights (probabilities) based on the observed data only. If all data are missing for a case, that case will be excluded from the analyses regardless of the setting of this option.

Options / C / W. See Common Options.

OK Click this button to accept all the specifications made in the dialog box and to close it. The analysis results are located in the Reporting Documents workspace node after running (updating) the project.

See also, Specifications - Options tab, Specifications - Validation tab, Results - Quick tab, Results - Advanced tab, Results - Code Generator tab, Downstream tab, and Home tab.