Additional PROC CLUSTER Options

Enter any SAS PROC CLUSTER options in this field to supplement those already specified.

You can specify any PROC CLUSTER options using the following syntax:

Option

where:

•	OPTION is the PROC CLUSTER option,

Examples of commonly used PROC DISTANCE options are listed in the following table:

Option	Definition
TRIM=n	Omits points with low estimated probability densities from the analysis. Valid values for n are 0 < n < 100. If n < 1, then n is the proportion of observations omitted. If n > 1, then n is interpreted as a percentage. A specification of TRIM=10, which trims 10% of the points, is a reasonable value for many data sets.
K=n	Specifies the number of neighbors to use for kth-nearest-neighbor density estimation. The number of neighbors (n) must be at least two but less than the number of observations.
R=n	Specifies the radius of the sphere of support (n) for uniform-kernel density estimation. The value of n must be greater than zero.
HYBRID	Requests the hybrid clustering method in which density estimates are computed from a preliminary cluster analysis using the K-Means clustering method.
BETA=n	Specifies the beta parameter (n) for the flexible beta method. The value of n should be less than 1, usually between 0 and -1. By default, BETA= -0.25.

To Specify One or More PROC CLUSTER Options:

Check the Perform SAS-based clustering on the genetic distance matrix box.

Type a specific PROC CLUSTER option in the Additional PROC CLUSTER Options field.

For example, to specify a trim value of 5%, type TRIM=5 in the text field, as shown below.

For Additional Information

Refer to the SAS PROC CLUSTER documentation for more information.