程序包 org.apache.flink.ml.stats.chisqtest

类 ChiSqTest

java.lang.Object

org.apache.flink.ml.stats.chisqtest.ChiSqTest

所有已实现的接口:

Serializable, org.apache.flink.ml.api.AlgoOperator<ChiSqTest>, org.apache.flink.ml.api.Stage<ChiSqTest>, org.apache.flink.ml.common.param.HasFeaturesCol<ChiSqTest>, org.apache.flink.ml.common.param.HasFlatten<ChiSqTest>, org.apache.flink.ml.common.param.HasLabelCol<ChiSqTest>, org.apache.flink.ml.param.WithParams<ChiSqTest>, ChiSqTestParams<ChiSqTest>

public class ChiSqTest
extends Object
implements org.apache.flink.ml.api.AlgoOperator<ChiSqTest>, ChiSqTestParams<ChiSqTest>

An AlgoOperator which implements the Chi-square test algorithm.

Chi-square Test computes the statistics of independence of variables in a contingency table, e.g., p-value, and DOF(degree of freedom) for each input feature. The contingency table is constructed from the observed categorical values.

The input of this algorithm is a table containing a labelColumn of numerical type and a featuresColumn of vector type. Each index in the input vector represents a feature to be tested. By default, the output of this algorithm is a table containing a single row with the following columns, each of which has one value per feature.

• "pValues": vector
• "degreesOfFreedom": int array
• "statistics": vector

The output of this algorithm can be flattened to multiple rows by setting HasFlatten.FLATTEN to true, which would contain the following columns:

• "featureIndex": int
• "pValue": double
• "degreeOfFreedom": int
• "statistic": double

See: http://en.wikipedia.org/wiki/Chi-squared_test.

另请参阅:

序列化表格

字段概要

从接口继承的字段 org.apache.flink.ml.common.param.HasFeaturesCol

FEATURES_COL

从接口继承的字段 org.apache.flink.ml.common.param.HasFlatten

FLATTEN

从接口继承的字段 org.apache.flink.ml.common.param.HasLabelCol

LABEL_COL

构造器概要

构造器

构造器	说明
ChiSqTest()

方法概要

修饰符和类型	方法	说明
Map<org.apache.flink.ml.param.Param<?>,Object>	getParamMap()
static ChiSqTest	load(org.apache.flink.table.api.bridge.java.StreamTableEnvironment tEnv, String path)
void	save(String path)
org.apache.flink.table.api.Table[]	transform(org.apache.flink.table.api.Table... inputs)

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.ml.common.param.HasFeaturesCol

getFeaturesCol, setFeaturesCol

从接口继承的方法 org.apache.flink.ml.common.param.HasFlatten

getFlatten, setFlatten

从接口继承的方法 org.apache.flink.ml.common.param.HasLabelCol

getLabelCol, setLabelCol

从接口继承的方法 org.apache.flink.ml.param.WithParams

get, getParam, set

构造器详细资料

ChiSqTest

public ChiSqTest()

方法详细资料

transform

public org.apache.flink.table.api.Table[] transform(org.apache.flink.table.api.Table... inputs)

指定者:

transform 在接口中 org.apache.flink.ml.api.AlgoOperator<ChiSqTest>

save

public void save(String path)
          throws IOException

指定者:

save 在接口中 org.apache.flink.ml.api.Stage<ChiSqTest>

抛出:

IOException

load

public static ChiSqTest load(org.apache.flink.table.api.bridge.java.StreamTableEnvironment tEnv,
                             String path)
                      throws IOException

抛出:

IOException

getParamMap

public Map<org.apache.flink.ml.param.Param<?>,Object> getParamMap()

指定者:

getParamMap 在接口中 org.apache.flink.ml.param.WithParams<ChiSqTest>