def h2o_median_absolute_error(y_actual, y_predicted): """ Median absolute error regression loss :param y_actual: H2OFrame of actual response. :param y_predicted: H2OFrame of predicted response. :return: loss (float) (best is 0.0) """ ModelBase._check_targets(y_actual, y_predicted) return (y_predicted - y_actual).abs().median()
def h2o_median_absolute_error(y_actual, y_predicted): """ Median absolute error regression loss :param y_actual: H2OFrame of actual response. :param y_predicted: H2OFrame of predicted response. :returns: median absolute error loss (best is 0.0) """ ModelBase._check_targets(y_actual, y_predicted) return (y_predicted - y_actual).abs().median()
def h2o_mean_squared_error(y_actual, y_predicted, weights=None): """ Mean squared error regression loss :param y_actual: H2OFrame of actual response. :param y_predicted: H2OFrame of predicted response. :param weights: (Optional) sample weights :returns: mean squared error loss (best is 0.0). """ ModelBase._check_targets(y_actual, y_predicted) return _colmean((y_predicted - y_actual)**2)
def h2o_mean_squared_error(y_actual, y_predicted, weights=None): """ Mean squared error regression loss :param y_actual: H2OFrame of actual response. :param y_predicted: H2OFrame of predicted response. :param weights: (Optional) sample weights :return: loss (float) (best is 0.0) """ ModelBase._check_targets(y_actual, y_predicted) return ((y_predicted - y_actual) ** 2).mean()[0]
def h2o_mean_absolute_error(y_actual, y_predicted, weights=None): """ Mean absolute error regression loss. :param y_actual: H2OFrame of actual response. :param y_predicted: H2OFrame of predicted response. :param weights: (Optional) sample weights :return: loss (float) (best is 0.0) """ ModelBase._check_targets(y_actual, y_predicted) return _colmean((y_predicted - y_actual).abs())
def h2o_mean_absolute_error(y_actual, y_predicted, weights=None): """ Mean absolute error regression loss. :param y_actual: H2OFrame of actual response. :param y_predicted: H2OFrame of predicted response. :param weights: (Optional) sample weights :return: loss (float) (best is 0.0) """ ModelBase._check_targets(y_actual, y_predicted) return _colmean((y_predicted - y_actual).abs())
def h2o_explained_variance_score(y_actual, y_predicted, weights=None): """ Explained variance regression score function. :param y_actual: H2OFrame of actual response. :param y_predicted: H2OFrame of predicted response. :param weights: (Optional) sample weights :returns: the explained variance score. """ ModelBase._check_targets(y_actual, y_predicted) _, numerator = _mean_var(y_actual - y_predicted, weights) _, denominator = _mean_var(y_actual, weights) if denominator == 0.0: return 1. if numerator == 0 else 0. # 0/0 => 1, otherwise, 0 return 1 - numerator / denominator
def h2o_r2_score(y_actual, y_predicted, weights=1.): """ R-squared (coefficient of determination) regression score function :param y_actual: H2OFrame of actual response. :param y_predicted: H2OFrame of predicted response. :param weights: (Optional) sample weights :returns: R-squared (best is 1.0, lower is worse). """ ModelBase._check_targets(y_actual, y_predicted) numerator = (weights * (y_actual - y_predicted)**2).sum() denominator = (weights * (y_actual - _colmean(y_actual))**2).sum() if denominator == 0.0: return 1. if numerator == 0. else 0. # 0/0 => 1, else 0 return 1 - numerator / denominator
def h2o_explained_variance_score(y_actual, y_predicted, weights=None): """ Explained variance regression score function :param y_actual: H2OFrame of actual response. :param y_predicted: H2OFrame of predicted response. :param weights: (Optional) sample weights :return: the explained variance score (float) """ ModelBase._check_targets(y_actual, y_predicted) _, numerator = _mean_var(y_actual - y_predicted, weights) _, denominator = _mean_var(y_actual, weights) if denominator == 0.0: return 1. if numerator == 0 else 0. # 0/0 => 1, otherwise, 0 return 1 - numerator / denominator
def h2o_r2_score(y_actual, y_predicted, weights=1.): """ R^2 (coefficient of determination) regression score function :param y_actual: H2OFrame of actual response. :param y_predicted: H2OFrame of predicted response. :param weights: (Optional) sample weights :return: R^2 (float) (best is 1.0, lower is worse) """ ModelBase._check_targets(y_actual, y_predicted) numerator = (weights * (y_actual - y_predicted) ** 2).sum() denominator = (weights * (y_actual - y_actual.mean()[0]) ** 2).sum() if denominator == 0.0: return 1. if numerator == 0. else 0. # 0/0 => 1, else 0 return 1 - numerator / denominator