instance.java

Boosting算法软件包

package jboost.examples;

/** Holds the input features of an Example */
public class Instance {
    /** an array of the attributes, null if attribute is undefined */
    protected Attribute[] attribute;
    /** constructor */
    public Instance (Attribute[] attArray) {attribute = attArray;}
    /** returns the number of attributes */
    public int getSize() {return attribute.length;}
    /** returns true if attribute i is defined */
    public boolean isDefined(int i){ return attribute[i].isDefined(); }
    /** returns the i'th attribute (null if undefined) */
    public Attribute getAttribute(int i){
	if(isDefined(i)){return attribute[i];}
	else {return null;}
    }
    public String toString() {
	String string = new String();
	for (int i=0; i< attribute.length; i++)
	    string += attribute[i]
		+((i<(attribute.length-1))?",":";");
	    
	return string;
    }
    public String toString(ExampleDescription ed) {
	String s = new String();
	for (int i=0; i< attribute.length; i++) {
	    s += ed.getAttributeDescription(i).getAttributeName()
		+":";
	    s += attribute[i]+"\n";
	    //	    s += ((i == attribute.length-1) ? "; " : ", ");
	}
	
	return s;
    }
}