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[ML] Implement AucRoc metric for classification (elastic#60502)
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141 changes: 141 additions & 0 deletions
141
.../src/main/java/org/elasticsearch/xpack/core/ml/dataframe/evaluation/EvaluationFields.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License; | ||
| * you may not use this file except in compliance with the Elastic License. | ||
| */ | ||
| package org.elasticsearch.xpack.core.ml.dataframe.evaluation; | ||
|
|
||
| import org.elasticsearch.common.Nullable; | ||
| import org.elasticsearch.common.ParseField; | ||
| import org.elasticsearch.common.collect.Tuple; | ||
|
|
||
| import java.util.Arrays; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
|
|
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| /** | ||
| * Encapsulates fields needed by evaluation. | ||
| */ | ||
| public final class EvaluationFields { | ||
|
|
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| public static final ParseField ACTUAL_FIELD = new ParseField("actual_field"); | ||
| public static final ParseField PREDICTED_FIELD = new ParseField("predicted_field"); | ||
| public static final ParseField TOP_CLASSES_FIELD = new ParseField("top_classes_field"); | ||
| public static final ParseField PREDICTED_CLASS_FIELD = new ParseField("predicted_class_field"); | ||
| public static final ParseField PREDICTED_PROBABILITY_FIELD = new ParseField("predicted_probability_field"); | ||
|
|
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| /** | ||
| * The field containing the actual value | ||
| */ | ||
| private final String actualField; | ||
|
|
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| /** | ||
| * The field containing the predicted value | ||
| */ | ||
| private final String predictedField; | ||
|
|
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| /** | ||
| * The field containing the array of top classes | ||
| */ | ||
| private final String topClassesField; | ||
|
|
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| /** | ||
| * The field containing the predicted class name value | ||
| */ | ||
| private final String predictedClassField; | ||
|
|
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| /** | ||
| * The field containing the predicted probability value in [0.0, 1.0] | ||
| */ | ||
| private final String predictedProbabilityField; | ||
|
|
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| /** | ||
| * Whether the {@code predictedProbabilityField} should be treated as nested (e.g.: when used in exists queries). | ||
| */ | ||
| private final boolean predictedProbabilityFieldNested; | ||
|
|
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| public EvaluationFields(@Nullable String actualField, | ||
| @Nullable String predictedField, | ||
| @Nullable String topClassesField, | ||
| @Nullable String predictedClassField, | ||
| @Nullable String predictedProbabilityField, | ||
| boolean predictedProbabilityFieldNested) { | ||
|
|
||
| this.actualField = actualField; | ||
| this.predictedField = predictedField; | ||
| this.topClassesField = topClassesField; | ||
| this.predictedClassField = predictedClassField; | ||
| this.predictedProbabilityField = predictedProbabilityField; | ||
| this.predictedProbabilityFieldNested = predictedProbabilityFieldNested; | ||
| } | ||
|
|
||
| /** | ||
| * Returns the field containing the actual value | ||
| */ | ||
| public String getActualField() { | ||
| return actualField; | ||
| } | ||
|
|
||
| /** | ||
| * Returns the field containing the predicted value | ||
| */ | ||
| public String getPredictedField() { | ||
| return predictedField; | ||
| } | ||
|
|
||
| /** | ||
| * Returns the field containing the array of top classes | ||
| */ | ||
| public String getTopClassesField() { | ||
| return topClassesField; | ||
| } | ||
|
|
||
| /** | ||
| * Returns the field containing the predicted class name value | ||
| */ | ||
| public String getPredictedClassField() { | ||
| return predictedClassField; | ||
| } | ||
|
|
||
| /** | ||
| * Returns the field containing the predicted probability value in [0.0, 1.0] | ||
| */ | ||
| public String getPredictedProbabilityField() { | ||
| return predictedProbabilityField; | ||
| } | ||
|
|
||
| /** | ||
| * Returns whether the {@code predictedProbabilityField} should be treated as nested (e.g.: when used in exists queries). | ||
| */ | ||
| public boolean isPredictedProbabilityFieldNested() { | ||
| return predictedProbabilityFieldNested; | ||
| } | ||
|
|
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| public List<Tuple<String, String>> listPotentiallyRequiredFields() { | ||
| return Arrays.asList( | ||
| Tuple.tuple(ACTUAL_FIELD.getPreferredName(), actualField), | ||
| Tuple.tuple(PREDICTED_FIELD.getPreferredName(), predictedField), | ||
| Tuple.tuple(TOP_CLASSES_FIELD.getPreferredName(), topClassesField), | ||
| Tuple.tuple(PREDICTED_CLASS_FIELD.getPreferredName(), predictedClassField), | ||
| Tuple.tuple(PREDICTED_PROBABILITY_FIELD.getPreferredName(), predictedProbabilityField)); | ||
| } | ||
|
|
||
| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) return true; | ||
| if (o == null || getClass() != o.getClass()) return false; | ||
| EvaluationFields that = (EvaluationFields) o; | ||
| return Objects.equals(that.actualField, this.actualField) | ||
| && Objects.equals(that.predictedField, this.predictedField) | ||
| && Objects.equals(that.topClassesField, this.topClassesField) | ||
| && Objects.equals(that.predictedClassField, this.predictedClassField) | ||
| && Objects.equals(that.predictedProbabilityField, this.predictedProbabilityField) | ||
| && Objects.equals(that.predictedProbabilityFieldNested, this.predictedProbabilityFieldNested); | ||
| } | ||
|
|
||
| @Override | ||
| public int hashCode() { | ||
| return Objects.hash( | ||
| actualField, predictedField, topClassesField, predictedClassField, predictedProbabilityField, predictedProbabilityFieldNested); | ||
| } | ||
| } |
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