de.unknownreality.dataframe.transform

Class CountTransformer<T extends Comparable<T>>

java.lang.Object

de.unknownreality.dataframe.transform.CountTransformer<T>

All Implemented Interfaces:

ColumnDataFrameTransform<DataFrameColumn<T,?>>

public class CountTransformer<T extends Comparable<T>>
extends Object
implements ColumnDataFrameTransform<DataFrameColumn<T,?>>

Created by algru on 06.09.2016.

Field Summary

Fields

Modifier and Type	Field and Description
static String	COUNTS_COLUMN

Constructor Summary

Constructors

Constructor and Description
CountTransformer()
CountTransformer(boolean ignoreNA)

Method Summary

Modifier and Type	Method and Description
DataFrame	transform(DataFrameColumn<T,?> source) Creates a new dataframe containing the values of the input column and a column with the corresponding counts

Methods inherited from class java.lang.Object

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

Field Detail

COUNTS_COLUMN

public static final String COUNTS_COLUMN

See Also:

Constant Field Values

Constructor Detail

CountTransformer

public CountTransformer(boolean ignoreNA)

CountTransformer

public CountTransformer()

Method Detail

transform

public DataFrame transform(DataFrameColumn<T,?> source)

Creates a new dataframe containing the values of the input column and a column with the corresponding counts

Specified by:

transform in interface ColumnDataFrameTransform<DataFrameColumn<T extends Comparable<T>,?>>

Parameters:

source - input column

Returns:

count dataframe