RollingColumn (tablesaw-core 0.44.0 API)

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 Column<?> column
The column providing the data for the rolling calculation

protected 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

All Methods Instance Methods Concrete Methods
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 Detail
  - 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 Detail
  - 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 Detail
  - 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