diff options
Diffstat (limited to 'python/pyspark')
| -rw-r--r-- | python/pyspark/ml/evaluation.py | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/python/pyspark/ml/evaluation.py b/python/pyspark/ml/evaluation.py index d8ddb78c6d..595593a7f2 100644 --- a/python/pyspark/ml/evaluation.py +++ b/python/pyspark/ml/evaluation.py @@ -160,13 +160,15 @@ class RegressionEvaluator(JavaEvaluator, HasLabelCol, HasPredictionCol): ... >>> evaluator = RegressionEvaluator(predictionCol="raw") >>> evaluator.evaluate(dataset) - 2.842... + -2.842... >>> evaluator.evaluate(dataset, {evaluator.metricName: "r2"}) 0.993... >>> evaluator.evaluate(dataset, {evaluator.metricName: "mae"}) - 2.649... + -2.649... """ - # a placeholder to make it appear in the generated doc + # Because we will maximize evaluation value (ref: `CrossValidator`), + # when we evaluate a metric that is needed to minimize (e.g., `"rmse"`, `"mse"`, `"mae"`), + # we take and output the negative of this metric. metricName = Param(Params._dummy(), "metricName", "metric name in evaluation (mse|rmse|r2|mae)") |