Workspace Node: Generalized Cluster Analysis - Results - Quick Tab

In the Generalized Cluster Analysis workspace node dialog box, under the Results heading, select the Quick tab to access the following options.

Element Name Description
Summary Select this check box to produce the summary statistics for the respective algorithm’s analysis (EM or k-Means).
Cluster means This option only applies to k-Means clustering, i.e., the k-Means option button is selected on the Specifications - Quick tab. Select this check box to produce a spreadsheet that contains the cluster means and the number of cases and percentage of cases in each cluster.
Cluster distance This option only applies to k-Means clustering. Select this check box to produce a spreadsheet with distances between all cluster centroids.
Prior (a-priori probabilities) This option applies only to the EM method of clustering, i.e., the EM option button is selected on the Specifications - Quick tab. Select this check box to produce a spreadsheet that contains the a priori probability values for each cluster.
Classification probabilities (weights) This option applies only to EM clustering. Select this check box to produce a spreadsheet that contains the classification probabilities for each observation and cluster, along with the final classifications (cluster assignment to the cluster with the highest probability).
Graph of continuous variable means Select this check box to produce a line graph that shows the scaled cluster means for all continuous variables. These means are computed as follows:

where

is the transformed (scaled) mean for continuous variable i and cluster j

 is the arithmetic ("unscaled") mean for continuous variable i and cluster j

are the maximum and minimum observed values for continuous variable i

In other words, the plotted values depict the means scaled to the overall ranges of observed values for the respective continuous variables.

Graph of cost sequence Select this check box to produce a line graph showing the respective error function (average distance of cases to cluster centers for k-Means; average log-likelihood of cases for EM) over the range of cluster solutions considered by the program. Note that this graph is only available when v-fold crossvalidation is used. See also the Introductory Overview for more details.
Cluster properties Use the options in this group box to review the assignment of observations (cases) to clusters, and other statistics computed for observations (distances from centroids for k-Means clustering; classification probabilities for EM clustering).
Drop-down list Select the specific cluster for which to review the respective results; leave the default All clusters to review the results for all cases.
Sort by cluster number Select this check box to produce the results for All clusters sorted by (assigned) cluster, rather than case number.
Members & distances This option applies only to k-Means clustering. (When EM is selected on the Specification - Quick tab, this option is named Members & probabilities; see description below.) Select this check box to produce a spreadsheet containing the final cluster assignments for all cases, the input data (variable values), and the distances of the cases to the respective (assigned) cluster centers. If a Sample Identifier Variable is specified in the Test-Sample dialog box (on the Specifications - Validation tab), you can select to display these values for the Analysis sample only, the Test set sample, or both (All samples), depending on which option is chosen in the Sample box.
Members & probabilities This option applies only to EM clustering. Select this check box to produce a spreadsheet containing the final cluster assignments for all cases, the input data (variable values), and the classification (cluster assignment) probabilities of the cases for the respective (assigned) clusters. If a Sample Identifier Variable is specified in the Test-Sample dialog box (accessed via the Specifications - Validation tab), you can select to display these values for the Analysis sample only, the Test set sample, or both (All samples), depending on which option is chosen in the Sample box.

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 will be placed in the Reporting Documents workspace node after running (updating) the project.