## Interface NormalizedPermutationDistanceMeasurer

• All Superinterfaces:
`NormalizedPermutationDistanceMeasurerDouble`, `PermutationDistanceMeasurer`, `PermutationDistanceMeasurerDouble`
All Known Implementing Classes:
`AcyclicEdgeDistance`, `BlockInterchangeDistance`, `CyclicEdgeDistance`, `CyclicRTypeDistance`, `DeviationDistance`, `ExactMatchDistance`, `InterchangeDistance`, `KendallTauDistance`, `LeeDistance`, `ReinsertionDistance`, `ReversalDistance`, `RTypeDistance`, `ScrambleDistance`, `SquaredDeviationDistance`

```public interface NormalizedPermutationDistanceMeasurer
extends NormalizedPermutationDistanceMeasurerDouble, PermutationDistanceMeasurer```
Implement this interface to define a distance metric for permutations that supports normalizing the distance to the interval [0,1], but where the base distance is an integer value.
• ### Method Summary

All Methods
Modifier and Type Method Description
`int` `max​(int length)`
Computes the maximum possible distance between permutations of a specified length.
`default double` `maxf​(int length)`
Computes the maximum possible distance between permutations of a specified length.
`default double` ```normalizedDistance​(Permutation p1, Permutation p2)```
Measures the distance between two permutations, normalized to the interval [0.0, 1.0].
• ### Methods inherited from interface org.cicirello.permutations.distance.PermutationDistanceMeasurer

`distance, distancef`
• ### Method Detail

• #### max

`int max​(int length)`
Computes the maximum possible distance between permutations of a specified length.
Parameters:
`length` - Permutation length.
Returns:
the maximum distance between a pair of permutations of the specified length.
• #### maxf

`default double maxf​(int length)`
Description copied from interface: `NormalizedPermutationDistanceMeasurerDouble`
Computes the maximum possible distance between permutations of a specified length.
Specified by:
`maxf` in interface `NormalizedPermutationDistanceMeasurerDouble`
Parameters:
`length` - Permutation length.
Returns:
the maximum distance between a pair of permutations of the specified length.
• #### normalizedDistance

```default double normalizedDistance​(Permutation p1,
Permutation p2)```

Measures the distance between two permutations, normalized to the interval [0.0, 1.0].

Specified by:
`normalizedDistance` in interface `NormalizedPermutationDistanceMeasurerDouble`
Parameters:
`p1` - first permutation
`p2` - second permutation
Returns:
distance between p1 and p2 normalized to the interval [0.0, 1.0]
Throws:
`IllegalArgumentException` - if p1.length() is not equal to p2.length().