The HPBNET Procedure

This example also uses the Iris data set that is available in the Sashelp library. In the following statements, STRUCTURE=TAN results in a tree-augmented Bayesian network.

 proc hpbnet data=sashelp.Iris numbin=3 structure=TAN
             prescreening=0 varselect=0;
     target Species;
     input PetalWidth PetalLength SepalLength SepalWidth/level=INT;
     output network=network;
 run;

The following statements produce Figure 5, which shows the network structure. In the structure, Species is a parent of PetalWidth, PetalLength, SepalLength, and SepalWidth. In addition, PetalWidth is a parent PetalLength, SepalWidth is a parent of SepalLength, and PetalWidth is a parent of SepalWidth.

 proc print data=network noobs label;
     var _parentnode_ _childnode_;
     where _type_="STRUCTURE";
 run;