decision tree has just one node

• drew

  SSC Rookie

  Points: 42

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  February 18, 2007 at 7:48 am

  #116277

  i am working with the view supplied with the db from the Spofford book on learning MDX to try to learn about decision trees because i couldnt figure out how to see the very beginnings of the model from Foodmart. My problem is that the decision tree only has one node.

  In searching BOL, i found two paramters called COMPLEXITY PENALTY and MINIMUM LEAF CASES that i thought would help me see the discrimination in the data better, but varying these two params by hi and low against each other did not produce a tree, just one node.

  Can i buy a clue as to what i am doing wrong to mask the branching?

  I called Brand Name the case and called it keys unique, Promo Name is an input only, SKU Name is predictable, but all i get is one lonely node.

  thanks very much for your help

  drew