www.pudn.com > id3ClaafierTreeCode.rar > DTCategorizer.java

package id3; 
import java.io.*; 
import shared.*; 
 
/** DTCategorizer performs the same way as a RDGCategorizer, but for the 
 * DTCategorizer the associated graph must be a tree.  See "RDGCat.c" for 
 * details. Assume graph exists. 
 * @author James Louis 5/30/2001 Ported to Java. 
 * @author Richard Long 9/05/93 Initial revision 
 */ 
public class DTCategorizer extends RDGCategorizer { 
    /** Constructor. 
     * @param dt The DecisionTree on which this categorizer will be based. 
     * @param descr A description of this categorizer. 
     * @param numCat The number of categories possible. 
     * @param sch The Schema of data this categorizer will be used on. 
     */ 
    public DTCategorizer(DecisionTree dt, String descr, int numCat, 
    Schema sch) { 
        super(constructor_cast(dt), descr, numCat, sch); 
    } 
     
    /** Casts this object to a RootedCatGraph object. 
     * @return This object as a RootedCatGraph object. 
     * @param dt	The DecisionTree to be stored in this DTCategorizer. 
     */ 
    private static RootedCatGraph constructor_cast(DecisionTree dt) { 
        RootedCatGraph rcg; 
         
        rcg = dt; //cast 
        dt = null; 
        return rcg; 
    } 
     
    /*************************************************************************** 
     * Displays this DTCategorizer object. 
     * @param stream	The BufferedWriter to which information will be displayed. 
     * @param dp		The preferences for display. 
     *************************************************************************** 
     * public void display_struct(BufferedWriter stream, DisplayPref dp) 
     * { 
     * try{ 
     * stream.write("DTCategorizer::display_struct: not implemented yet."+'\n'); 
     * }catch(IOException e){e.printStackTrace();} 
     * } 
     */ 
}