VectorAccumulator

```
public interface VectorAccumulator
```
A vector accumulator that accumulates vector's elements.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`double`	`accumulate()`	Returns the accumulated value and resets this accumulator.
`void`	`update(int i, double value)`	Updates a value that was accumulated so far with new vector's element.

- Method Detail
  - update
```
void update(int i,
            double value)
```
    Updates a value that was accumulated so far with new vector's element.
    
    Parameters:
    
    i - the element's index
    
    value - the element's value
  - accumulate
```
double accumulate()
```
    Returns the accumulated value and resets this accumulator.
    
    Returns:
    
    the accumulated value