org.apache.spark.ml.evaluation

Class BinaryClassificationEvaluator

Object

org.apache.spark.ml.evaluation.Evaluator

org.apache.spark.ml.evaluation.BinaryClassificationEvaluator

All Implemented Interfaces:

java.io.Serializable, Params, Identifiable

public class BinaryClassificationEvaluator
extends Evaluator

:: Experimental :: Evaluator for binary classification, which expects two input columns: rawPrediction and label.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
BinaryClassificationEvaluator()
BinaryClassificationEvaluator(String uid)

Method Summary

Methods

Modifier and Type	Method and Description
BinaryClassificationEvaluator	copy(ParamMap extra) Creates a copy of this instance with the same UID and some extra params.
double	evaluate(DataFrame dataset) Evaluates the output.
String	getMetricName()
boolean	isLargerBetter() Indicates whether the metric returned by evaluate() should be maximized (true, default) or minimized (false).
static BinaryClassificationEvaluator	load(String path)
Param<String>	metricName() param for metric name in evaluation Default: areaUnderROC
BinaryClassificationEvaluator	setLabelCol(String value)
BinaryClassificationEvaluator	setMetricName(String value)
BinaryClassificationEvaluator	setRawPredictionCol(String value)
BinaryClassificationEvaluator	setScoreCol(String value) Deprecated. use setRawPredictionCol() instead
String	uid() An immutable unique ID for the object and its derivatives.

Methods inherited from class org.apache.spark.ml.evaluation.Evaluator

evaluate

Methods inherited from class Object

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

Methods inherited from interface org.apache.spark.ml.param.Params

clear, copyValues, defaultCopy, defaultParamMap, explainParam, explainParams, extractParamMap, extractParamMap, get, getDefault, getOrDefault, getParam, hasDefault, hasParam, isDefined, isSet, paramMap, params, set, set, set, setDefault, setDefault, shouldOwn, validateParams

Methods inherited from interface org.apache.spark.ml.util.Identifiable

toString

Constructor Detail

BinaryClassificationEvaluator

public BinaryClassificationEvaluator(String uid)

BinaryClassificationEvaluator

public BinaryClassificationEvaluator()

Method Detail

load

public static BinaryClassificationEvaluator load(String path)

uid

public String uid()

Description copied from interface: Identifiable

An immutable unique ID for the object and its derivatives.

Returns:

(undocumented)

metricName

public Param<String> metricName()

param for metric name in evaluation Default: areaUnderROC

Returns:

(undocumented)

getMetricName

public String getMetricName()

setMetricName

public BinaryClassificationEvaluator setMetricName(String value)

setRawPredictionCol

public BinaryClassificationEvaluator setRawPredictionCol(String value)

setScoreCol

public BinaryClassificationEvaluator setScoreCol(String value)

Deprecated. use setRawPredictionCol() instead

Parameters:

value - (undocumented)

Returns:

(undocumented)

setLabelCol

public BinaryClassificationEvaluator setLabelCol(String value)

evaluate

public double evaluate(DataFrame dataset)

Description copied from class: Evaluator

Evaluates the output.

Specified by:

evaluate in class Evaluator

Parameters:

dataset - a dataset that contains labels/observations and predictions.

Returns:

metric

isLargerBetter

public boolean isLargerBetter()

Description copied from class: Evaluator

Indicates whether the metric returned by evaluate() should be maximized (true, default) or minimized (false). A given evaluator may support multiple metrics which may be maximized or minimized.

Overrides:

isLargerBetter in class Evaluator

Returns:

(undocumented)

copy

public BinaryClassificationEvaluator copy(ParamMap extra)

Description copied from interface: Params

Creates a copy of this instance with the same UID and some extra params. Subclasses should implement this method and set the return type properly.

Specified by:

copy in interface Params

Specified by:

copy in class Evaluator

Parameters:

extra - (undocumented)

Returns:

(undocumented)

See Also:

defaultCopy()