程序包 org.apache.flink.ml.feature.stringindexer

类 StringIndexer

java.lang.Object

org.apache.flink.ml.feature.stringindexer.StringIndexer

所有已实现的接口:

Serializable, org.apache.flink.ml.api.Estimator<StringIndexer,StringIndexerModel>, org.apache.flink.ml.api.Stage<StringIndexer>, org.apache.flink.ml.common.param.HasHandleInvalid<StringIndexer>, org.apache.flink.ml.common.param.HasInputCols<StringIndexer>, org.apache.flink.ml.common.param.HasOutputCols<StringIndexer>, StringIndexerModelParams<StringIndexer>, StringIndexerParams<StringIndexer>, org.apache.flink.ml.param.WithParams<StringIndexer>

public class StringIndexer
extends Object
implements org.apache.flink.ml.api.Estimator<StringIndexer,StringIndexerModel>, StringIndexerParams<StringIndexer>

An Estimator which implements the string indexing algorithm.

A string indexer maps one or more columns (string/numerical value) of the input to one or more indexed output columns (integer value). The output indices of two data points are the same iff their corresponding input columns are the same. The indices are in [0, numDistinctValuesInThisColumn].

The input columns are cast to string if they are numeric values. By default, the output model is arbitrarily ordered. Users can control this by setting StringIndexerParams.STRING_ORDER_TYPE.

User can also control the max number of output indices by setting StringIndexerParams.MAX_INDEX_NUM. This parameter only works if StringIndexerParams.STRING_ORDER_TYPE is set as 'frequencyDesc'.

The `keep` option of HasHandleInvalid means that we transform the invalid input into a special index, whose value is the number of distinct values in this column.

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.HasHandleInvalid

ERROR_INVALID, HANDLE_INVALID, KEEP_INVALID, SKIP_INVALID

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

INPUT_COLS

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

OUTPUT_COLS

从接口继承的字段 org.apache.flink.ml.feature.stringindexer.StringIndexerParams

ALPHABET_ASC_ORDER, ALPHABET_DESC_ORDER, ARBITRARY_ORDER, FREQUENCY_ASC_ORDER, FREQUENCY_DESC_ORDER, MAX_INDEX_NUM, STRING_ORDER_TYPE

构造器概要

构造器

构造器	说明
StringIndexer()

方法概要

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

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.HasHandleInvalid

getHandleInvalid, setHandleInvalid

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

getInputCols, setInputCols

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

getOutputCols, setOutputCols

从接口继承的方法 org.apache.flink.ml.feature.stringindexer.StringIndexerParams

getMaxIndexNum, getStringOrderType, setMaxIndexNum, setStringOrderType

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

get, getParam, set

构造器详细资料

StringIndexer

public StringIndexer()

方法详细资料

save

public void save(String path)
          throws IOException

指定者:

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

抛出:

IOException

load

public static StringIndexer 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<StringIndexer>

fit

public StringIndexerModel fit(org.apache.flink.table.api.Table... inputs)

指定者:

fit 在接口中 org.apache.flink.ml.api.Estimator<StringIndexer,StringIndexerModel>