The coefficient of determination or R Squared (R²) is the proportion of the variance in the target labels that is explainable from the predictions. It gives an indication as to how well the predictions approximate the labels.
Estimator Compatibility: Regressor
Output Range: -∞ to 1
This metric does not have any parameters.
use Rubix\ML\CrossValidation\Metrics\RSquared; $metric = new RSquared();