Package tech.tablesaw.table

Class RollingColumn

java.lang.Object

tech.tablesaw.table.RollingColumn

Direct Known Subclasses:

NumberRollingColumn

public class RollingColumn
extends Object

Does a calculation on a rolling basis (e.g. mean for last 20 days)

Field Summary

Fields

Modifier and Type	Field	Description
protected final Column<?>	column	The column providing the data for the rolling calculation
protected final int	window	The size of the rolling window

Constructor Summary

Constructors

Constructor	Description
RollingColumn(Column<?> column, int window)	Constructs a rolling column based on calculations on a sliding window of window rows of data from the given column

Method Summary

Modifier and Type	Method	Description
<INCOL extends Column<?>, OUT> Column<?>	calc(AggregateFunction<INCOL,OUT> function)	Performs the calculation and returns a new column containing the results
protected String	generateNewColumnName(AggregateFunction<?,?> function)	Generates a name for the column based on the name of the original column and the function used in the calculation

Methods inherited from class java.lang.Object

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

Field Details

column

protected final Column<?> column

The column providing the data for the rolling calculation

window

protected final int window

The size of the rolling window

Constructor Details

RollingColumn

public RollingColumn(Column<?> column,
 int window)

Constructs a rolling column based on calculations on a sliding window of window rows of data from the given column

Method Details

generateNewColumnName

protected String generateNewColumnName(AggregateFunction<?,?> function)

Generates a name for the column based on the name of the original column and the function used in the calculation

calc

public <INCOL extends Column<?>,
OUT> Column<?> calc(AggregateFunction<INCOL,OUT> function)

Performs the calculation and returns a new column containing the results