When you launch the K Nearest Neighbors platform via JSL, you can use the following arguments that are available only in JSL:
Use Excluded Rows for Validation( 0|1 )
The following messages for a K Nearest Neighbors object are available only in JSL:
knn_object << Get Measures;
knn_object << ( Response[number] << Get Prediction Formula );
knn_object << ( Response[number] << Get Best K );
knn_object << ( Response[number] << Set K( number ) );