Package elki.application.greedyensemble

Class EvaluatePrecomputedOutlierScores

java.lang.Object

elki.application.AbstractApplication

elki.application.greedyensemble.EvaluatePrecomputedOutlierScores

public class EvaluatePrecomputedOutlierScores
extends AbstractApplication

Class to load an outlier detection summary file, as produced by ComputeKNNOutlierScores, and compute popular evaluation metrics.

File format description:

• Each column is one object in the data set
• Each line is a different algorithm
• There is a mandatory label column, containing the method name
• The first line must contain the ground-truth, titled bylabel, where 0 indicates an inlier and 1 indicates an outlier

The evaluation assumes that high scores correspond to outliers, unless the method name matches the pattern given using -reversed. The default value matches several scores known to use reversed values.

Since:

0.7.0

Author:

Erich Schubert, Guilherme Oliveira Campos

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	EvaluatePrecomputedOutlierScores.Par	Parameterization class.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) double	endcg	Normalization term E[NDCG].
(package private) java.net.URI	infile	The data input file.
static java.lang.String	KNOWN_REVERSED	Pattern to match a set of known reversed scores.
private static Logging	LOG	Get static logger.
(package private) java.lang.String	name	Constant column to prepend (may be null)
(package private) java.nio.file.Path	outfile	Output file name
(package private) StreamingParser	parser	Parser to read input data.
(package private) NumberVector	positive	Vector of positive values.
(package private) java.util.regex.Pattern	reverse	Pattern to recognize reversed methods.

Fields inherited from class elki.application.AbstractApplication

REFERENCE, VERSION

Constructor Summary

Constructors

Constructor	Description
EvaluatePrecomputedOutlierScores(java.net.URI infile, StreamingParser parser, java.util.regex.Pattern reverse, java.nio.file.Path outfile, java.lang.String name)	Constructor.

Method Summary

Modifier and Type	Method	Description
private boolean	checkForNaNs(NumberVector vec)	Check for NaN values.
static void	main(java.lang.String[] args)	Main method.
private void	processRow(java.io.PrintStream fout, NumberVector vec, java.lang.String label)
void	run()	Runs the application.
private void	writeHeader(java.io.PrintStream fout)

Methods inherited from class elki.application.AbstractApplication

printErrorMessage, runCLIApplication, usage

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final Logging LOG

Get static logger.

KNOWN_REVERSED

public static final java.lang.String KNOWN_REVERSED

Pattern to match a set of known reversed scores.

See Also:

Constant Field Values

infile

java.net.URI infile

The data input file.

parser

StreamingParser parser

Parser to read input data.

reverse

java.util.regex.Pattern reverse

Pattern to recognize reversed methods.

outfile

java.nio.file.Path outfile

Output file name

name

java.lang.String name

Constant column to prepend (may be null)

positive

NumberVector positive

Vector of positive values.

endcg

double endcg

Normalization term E[NDCG].

Constructor Detail

EvaluatePrecomputedOutlierScores

public EvaluatePrecomputedOutlierScores(java.net.URI infile,
                                        StreamingParser parser,
                                        java.util.regex.Pattern reverse,
                                        java.nio.file.Path outfile,
                                        java.lang.String name)

Constructor.

Parameters:

infile - Input file

parser - Streaming input parser

reverse - Pattern for reversed outlier scores.

outfile - Output file name

name - Constant column to prepend

Method Detail

run

public void run()

Description copied from class: AbstractApplication

Runs the application.

Specified by:

run in class AbstractApplication

writeHeader

private void writeHeader(java.io.PrintStream fout)

processRow

private void processRow(java.io.PrintStream fout,
                        NumberVector vec,
                        java.lang.String label)

checkForNaNs

private boolean checkForNaNs(NumberVector vec)

Check for NaN values.

Parameters:

vec - Vector

Returns:

true if NaN values are present.

main

public static void main(java.lang.String[] args)

Main method.

Parameters:

args - Command line parameters.