org.apache.spark.ml.feature

Class ChiSqSelectorModel

java.lang.Object

org.apache.spark.ml.PipelineStage

org.apache.spark.ml.Transformer

org.apache.spark.ml.Model<ChiSqSelectorModel>

org.apache.spark.ml.feature.ChiSqSelectorModel

All Implemented Interfaces:

java.io.Serializable, Logging, Params, Identifiable, MLWritable

public final class ChiSqSelectorModel
extends Model<ChiSqSelectorModel>
implements MLWritable

See Also:

Serialized Form

Method Summary

Methods

Modifier and Type	Method and Description
ChiSqSelectorModel	copy(ParamMap extra) Creates a copy of this instance with the same UID and some extra params.
int	getNumTopFeatures()
static ChiSqSelectorModel	load(java.lang.String path)
IntParam	numTopFeatures() Number of features that selector will select (ordered by statistic value descending).
static MLReader<ChiSqSelectorModel>	read()
int[]	selectedFeatures()
ChiSqSelectorModel	setFeaturesCol(java.lang.String value)
ChiSqSelectorModel	setLabelCol(java.lang.String value)
ChiSqSelectorModel	setOutputCol(java.lang.String value)
DataFrame	transform(DataFrame dataset) Transforms the input dataset.
StructType	transformSchema(StructType schema) :: DeveloperApi ::
java.lang.String	uid() An immutable unique ID for the object and its derivatives.
MLWriter	write() Returns an MLWriter instance for this ML instance.

Methods inherited from class org.apache.spark.ml.Model

hasParent, parent, setParent

Methods inherited from class org.apache.spark.ml.Transformer

transform, transform, transform

Methods inherited from class org.apache.spark.ml.PipelineStage

transformSchema

Methods inherited from class java.lang.Object

clone, equals, finalize, 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

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

save

Methods inherited from interface org.apache.spark.Logging

initializeIfNecessary, initializeLogging, isTraceEnabled, log_, log, logDebug, logDebug, logError, logError, logInfo, logInfo, logName, logTrace, logTrace, logWarning, logWarning

Method Detail

read

public static MLReader<ChiSqSelectorModel> read()

load

public static ChiSqSelectorModel load(java.lang.String path)

uid

public java.lang.String uid()

Description copied from interface: Identifiable

An immutable unique ID for the object and its derivatives.

Specified by:

uid in interface Identifiable

Returns:

(undocumented)

selectedFeatures

public int[] selectedFeatures()

setFeaturesCol

public ChiSqSelectorModel setFeaturesCol(java.lang.String value)

setOutputCol

public ChiSqSelectorModel setOutputCol(java.lang.String value)

setLabelCol

public ChiSqSelectorModel setLabelCol(java.lang.String value)

transform

public DataFrame transform(DataFrame dataset)

Description copied from class: Transformer

Transforms the input dataset.

Specified by:

transform in class Transformer

Parameters:

dataset - (undocumented)

Returns:

(undocumented)

transformSchema

public StructType transformSchema(StructType schema)

Description copied from class: PipelineStage

:: DeveloperApi ::

Derives the output schema from the input schema.

Specified by:

transformSchema in class PipelineStage

Parameters:

schema - (undocumented)

Returns:

(undocumented)

copy

public ChiSqSelectorModel 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 Model<ChiSqSelectorModel>

Parameters:

extra - (undocumented)

Returns:

(undocumented)

See Also:

defaultCopy()

write

public MLWriter write()

Description copied from interface: MLWritable

Returns an MLWriter instance for this ML instance.

Specified by:

write in interface MLWritable

Returns:

(undocumented)

numTopFeatures

public IntParam numTopFeatures()

Number of features that selector will select (ordered by statistic value descending). If the number of features is < numTopFeatures, then this will select all features. The default value of numTopFeatures is 50.

Returns:

(undocumented)

getNumTopFeatures

public int getNumTopFeatures()