smile.validation

Class Precision

java.lang.Object

smile.validation.Precision

All Implemented Interfaces:

ClassificationMeasure

public class Precision
extends Object
implements ClassificationMeasure

The precision or positive predictive value (PPV) is ratio of true positives to combined true and false positives, which is different from sensitivity.

PPV = TP / (TP + FP)

Author:

Haifeng Li

Constructor Summary

Constructors

Constructor and Description
Precision()

Method Summary

Methods

Modifier and Type	Method and Description
double	measure(int[] truth, int[] prediction) Returns an index to measure the quality of classification.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Precision

public Precision()

Method Detail

measure

public double measure(int[] truth,
             int[] prediction)

Description copied from interface: ClassificationMeasure

Returns an index to measure the quality of classification.

Specified by:

measure in interface ClassificationMeasure

Parameters:

truth - the true class labels.

prediction - the predicted class labels.

toString

public String toString()

Overrides:

toString in class Object