com.compomics.util.math.statistics

Class ROC

java.lang.Object

com.compomics.util.math.statistics.ROC

public class ROC
extends Object

This class can be used to draw ROC curves.

Author:

Marc Vaudel

Constructor Summary

Constructors

Constructor and Description
ROC(Distribution distributionControl, Distribution distributionPatient) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
double	getSpecificityAt(double sensitivity) Returns the specificity at a given sensitivity.
double	getValueAt(double specificity) Returns the sensitivity at a given specificity, i.e., 1-type 2 error, the number of true healthy for a given type 1 error, the number of false healthy.

Methods inherited from class java.lang.Object

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

Constructor Detail

ROC

public ROC(Distribution distributionControl,
   Distribution distributionPatient)

Constructor. The patient distribution should be higher (to the right) than the control distribution.

Parameters:

distributionControl - the control distribution

distributionPatient - the patient distribution

Method Detail

getValueAt

public double getValueAt(double specificity)
                  throws org.apache.commons.math.MathException

Returns the sensitivity at a given specificity, i.e., 1-type 2 error, the number of true healthy for a given type 1 error, the number of false healthy.

Parameters:

specificity - the specificity (0.1 is 10%)

Returns:

the sensitivity at the given specificity (0.1 is 10%)

Throws:

org.apache.commons.math.MathException

getSpecificityAt

public double getSpecificityAt(double sensitivity)
                        throws org.apache.commons.math.MathException

Returns the specificity at a given sensitivity.

Parameters:

sensitivity - the sensitivity (0.1 is 10%)

Returns:

the corresponding specificity (0.1 is 10%)

Throws:

org.apache.commons.math.MathException