<span style="float:right;"><a href="https://github.com/RubixML/RubixML/blob/master/src/CrossValidation/Metrics/MCC.php">[source]</a></span>

# MCC
Matthews Correlation Coefficient (MCC) measures the quality of a classification by taking true and false positives and negatives into account. It is generally regarded as a balanced measure which can be used even if the classes are of very different sizes. A coefficient of 1 represents a perfect prediction, 0 no better than random prediction, and −1 indicates total disagreement between prediction and observation.

**Estimator Compatibility:** Classifier, Anomaly Detector

**Output Range:** -1 to 1

## Parameters
This metric does not have any parameters.

## Example
```php
use Rubix\ML\CrossValidation\Metrics\MCC;

$metric = new MCC();
```

### References
>- B. W. Matthews. (1975). Decision of the Predicted and Observed Secondary Structure of T4 Phage Lysozyme.