Given the ground truth (correct) target values and the estimated target values, calculates the the R^2 metric.
measure_r2_score(y_true, y_pred)A numeric vector; the ground truth (correct) target values.
A numeric vector; the estimated target values.
A numeric vector of length one; the R^2 metric.
See here for more information: https://en.wikipedia.org/wiki/Coefficient_of_determination
Other measure: measure_auc_score,
measure_correlation_score,
measure_mse_score