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K-Nearest-Neighbor, aka KNN, is a widely-used data mining tool and is often called a memory-based/case-based/instance-based method as no model is fit. A good introduction to KNN can be found at .
You can use KNN in SAS by invoking two procedures: PROC LOESS or PROC DISCRIM.
 Trevor Hastie, Robert Tibshirani, Jerome Friedman, "Elements of Statistical Learning", Ed.2, Springer, 2008;
Submitted by Liang Xie. Contact me at my Discussion Page.
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