RankingAlgorithm (Apache Commons Statistics Ranking 1.1 API)

All Superinterfaces:

Function<double[],double[]>, UnaryOperator<double[]>

All Known Implementing Classes:

NaturalRanking

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface RankingAlgorithm
extends UnaryOperator<double[]>
```
Interface representing a rank transformation.

Since:

1.1

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`double[]`	`apply(double[] data)`	Performs a rank transformation on the input data, returning an array of ranks.

Methods inherited from interface java.util.function.Function
andThen, compose

- Method Detail
  - apply
```
double[] apply(double[] data)
```
    Performs a rank transformation on the input data, returning an array of ranks.
    Ranks should be 1-based: the smallest value returned in an array of ranks should be greater than or equal to one, rather than 0. Ranks should in general take integer values, though implementations may return averages or other floating point values to resolve ties in the input data.
    
    Specified by:
    
    apply in interface Function<double[],double[]>
    
    Parameters:
    
    data - Array of data to be ranked.
    
    Returns:
    
    an array of ranks corresponding to the elements of the input array