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articles/machine-learning/service/how-to-understand-automated-ml.md

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@@ -3,7 +3,7 @@ title: Understand automated ML results
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titleSuffix: Azure Machine Learning
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description: Learn how to view and understand charts and metrics for each of your automated machine learning runs.
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services: machine-learning
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author: rakellam
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author: RachelKellam
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ms.author: rakellam
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ms.reviewer: sgilley
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ms.service: machine-learning
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recall_score_micro|Recall is the percent of correctly labeled elements of a certain class. Micro is computed globally by counting the total true positives, false negatives and false positives|[Calculation](https://scikit-learn.org/stable/modules/generated/sklearn.metrics.recall_score.html)|average="micro"|
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recall_score_weighted|Recall is the percent of correctly labeled elements of a certain class. Weighted is the arithmetic mean of recall for each class, weighted by number of true instances in each class.|[Calculation](https://scikit-learn.org/stable/modules/generated/sklearn.metrics.recall_score.html)|average="weighted"|
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weighted_accuracy|Weighted accuracy is accuracy where the weight given to each example is equal to the proportion of true instances in that example's true class.|[Calculation](https://scikit-learn.org/stable/modules/generated/sklearn.metrics.accuracy_score.html)|sample_weight is a vector equal to the proportion of that class for each element in the target|
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<a name="confusion-matrix"></a>
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### Confusion matrix
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#### What is a confusion matrix?
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A confusion matrix is used to describe the performance of a classification model. Each row displays the instances of the true, or actual class in your dataset, and each column represents the instances of the class that was predicted by the model.
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##### Example 3: A classifcation model with high accuracy and high bias in model predictions
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![A classifcation model with high accuracy and high bias in model predictions](./media/how-to-understand-automated-ml/azure-machine-learning-auto-ml-biased-model.png)
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<a name="precision-recall-chart"></a>
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### Precision-recall chart
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#### What is a precision-recall chart?
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The precision-recall curve shows the relationship between precision and recall from a model. The term precision represents that ability for a model to label all instances correctly. Recall represents the ability for a classifier to find all instances of a particular label.
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##### Example 2: A classification model with ~100% precision and ~100% recall
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![A classification model high precision and recall](./media/how-to-understand-automated-ml/azure-machine-learning-auto-ml-precision-recall2.png)
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<a name="roc"></a>
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### ROC chart
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#### What is a ROC chart?
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##### Example 2: A classification model with high true labels and low false labels
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![a classification model with high true labels and low false labels](./media/how-to-understand-automated-ml/azure-machine-learning-auto-ml-roc-2.png)
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<a name="lift-curve"></a>
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### Lift chart
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#### What is a lift chart?
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Lift charts are used to evaluate the performance of a classification model. It shows how much better you can expect to do with the generated model compared to without a model in terms of accuracy.
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![A classification model that does worse than a random selection model](./media/how-to-understand-automated-ml/azure-machine-learning-auto-ml-lift-curve1.png)
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##### Example 2: A classification model that performs better than a random selection model
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![A classification model that performs better](./media/how-to-understand-automated-ml/azure-machine-learning-auto-ml-lift-curve2.png)
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<a name="gains-curve"></a>
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### Gains chart
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#### What is a gains chart?
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##### Example 2: A classification model with significant gain
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![A classification model with significant gain](./media/how-to-understand-automated-ml/azure-machine-learning-auto-ml-gains-curve2.png)
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<a name="calibration-plot"></a>
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### Calibration chart
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#### What is a calibration chart?

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