TopographicErrorHistogram (Apache Commons Math 3.6.1 API)

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java.lang.Object
- org.apache.commons.math3.ml.neuralnet.twod.util.TopographicErrorHistogram

All Implemented Interfaces:

MapDataVisualization
```
public class TopographicErrorHistogram
extends Object
implements MapDataVisualization
```
Computes the topographic error histogram. Each bin will contain the number of data for which the first and second best matching units are not adjacent in the map.

Since:

3.6

Constructor Summary

Constructors
Constructor and Description

TopographicErrorHistogram(boolean relativeCount, DistanceMeasure distance)

Method Summary

Methods
Modifier and Type	Method and Description
`double[][]`	`computeImage(NeuronSquareMesh2D map, Iterable<double[]> data)` Creates an image of the `data` metrics when represented by the `map`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - TopographicErrorHistogram
```
public TopographicErrorHistogram(boolean relativeCount,
                         DistanceMeasure distance)
```
    Parameters:
    relativeCount - Whether to compute relative bin counts. If true, the data count in each bin will be divided by the total number of samples mapped to the neuron represented by that bin.
    distance - Distance.
- Method Detail
  - computeImage
```
public double[][] computeImage(NeuronSquareMesh2D map,
                      Iterable<double[]> data)
```
    Creates an image of the data metrics when represented by the map.
    
    Specified by:
    
    computeImage in interface MapDataVisualization
    
    Parameters:
    map - Map.
    data - Data.
    
    Returns:
    a 2D-array (in row major order) representing the metrics.

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