ID Variables

Use this field to specify one or more variables whose values that can, either singly or in combination, provide a unique identifier for each row. These variables are used for various purposes, depending on the context (for example, to generate names for distance variables, or to merge a K matrix with other variables from the input data set) and are copied to the output data set.

The maximum length of the combined Prefix + ID variables is 32 characters minus the number of rows in the data set. If the form of the input data is already a distance matrix , these ID variables are used to label the cluster dendrogram .

To Specify One or More Input ID Variables:

Specify an Input SAS Data Set .

All of the variables in the input data set are displayed in the Available Variables field.

Examine the list of available variables.

Highlight one or more variables.

Click to add the highlighted variable(s) to the ID Variables field, as shown below: