Package edu.cmu.tetrad.util

Class RocCalculator

java.lang.Object

edu.cmu.tetrad.util.RocCalculator

public class RocCalculator
extends Object

Calculates a ROC curve and AUC (area under curve) for a list of scored cases whose inclusion in category C is known.

Version:

$Id: $Id

Author:

josephramsey and Frank Wimberly

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ASCENDING	Constant ASCENDING=0

Constructor Summary

Constructors

Constructor	Description
RocCalculator(double[] scores, boolean[] inCategory, int direction)	Constructs a calculator using the parameter information below.

Method Summary

Modifier and Type	Method	Description
double	getAuc()	Calculates the area under the ROC curve using a very clever Ramsey idea.
double[][]	getScaledRocPlot()	getScaledRocPlot.

Methods inherited from class java.lang.Object

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

Field Details

ASCENDING

public static final int ASCENDING

Constant ASCENDING=0

See Also:

• Constant Field Values

Constructor Details

RocCalculator

public RocCalculator(double[] scores,
 boolean[] inCategory,
 int direction)

Constructs a calculator using the parameter information below.

Parameters:

scores - The scores to be plotted.

inCategory - Whether each score is in the category in question or not. Must be an array of the same length as scores.

direction - Either RocCalculator.ASCENDING or RocCalculator.DESCENDING.

Method Details

getAuc

public double getAuc()

Calculates the area under the ROC curve using a very clever Ramsey idea.

Returns:

the area under the ROC curve (AUC).

getScaledRocPlot

public double[][] getScaledRocPlot()

getScaledRocPlot.

Returns:

an array of objects