Hi Hussein, A great thing about Enterprise Miner is that you can try multiple techniques at once. Since two flows on a diagram run in parallel you are also making the most out of your time. Note that nodes like decision tree will do variable selection, and nodes like PCA will do dimension reduction. Advanced Predictive Modeling Using SAS Enterprise Miner is a course that explains very well advanced topics, including unsupervised (PCA, variable clustering, etc) and supervised (PLS, LARS, LASSO, etc) dimension reduction techniques. Highly recommended! A best practice is to try several techniques and select the one that suits your target, number of observations, and number of input variables. Also check this discussion ( ) where you can find a list of nodes that you can use for variable selection. Also, what kind of classification of problem are you trying to solve? Are you dealing with missing values in the input variables? And what is the distribution of those 6 classes? You might even want to use a two-step model. I hope it helps, Miguel
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