Class AccuracyMetric
java.lang.Object
org.elasticsearch.client.ml.dataframe.evaluation.classification.AccuracyMetric
- All Implemented Interfaces:
EvaluationMetric
,org.elasticsearch.xcontent.ToXContent
,org.elasticsearch.xcontent.ToXContentObject
AccuracyMetric
is a metric that answers the following two questions:
1. What is the fraction of documents for which predicted class equals the actual class?
equation: overall_accuracy = 1/n * Σ(y == y')
where: n = total number of documents
y = document's actual class
y' = document's predicted class
2. For any given class X, what is the fraction of documents for which either
a) both actual and predicted class are equal to X (true positives)
or
b) both actual and predicted class are not equal to X (true negatives)
equation: accuracy(X) = 1/n * (TP(X) + TN(X))
where: X = class being examined
n = total number of documents
TP(X) = number of true positives wrt X
TN(X) = number of true negatives wrt X-
Nested Class Summary
Nested classes/interfaces inherited from interface org.elasticsearch.xcontent.ToXContent
org.elasticsearch.xcontent.ToXContent.DelegatingMapParams, org.elasticsearch.xcontent.ToXContent.MapParams, org.elasticsearch.xcontent.ToXContent.Params
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Field Summary
Fields inherited from interface org.elasticsearch.xcontent.ToXContent
EMPTY_PARAMS
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionboolean
static AccuracyMetric
fromXContent
(org.elasticsearch.xcontent.XContentParser parser) getName()
Returns the name of the metricint
hashCode()
org.elasticsearch.xcontent.XContentBuilder
toXContent
(org.elasticsearch.xcontent.XContentBuilder builder, org.elasticsearch.xcontent.ToXContent.Params params) Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.elasticsearch.xcontent.ToXContentObject
isFragment
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Field Details
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NAME
- See Also:
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Constructor Details
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AccuracyMetric
public AccuracyMetric()
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Method Details
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fromXContent
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getName
Description copied from interface:EvaluationMetric
Returns the name of the metric- Specified by:
getName
in interfaceEvaluationMetric
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toXContent
public org.elasticsearch.xcontent.XContentBuilder toXContent(org.elasticsearch.xcontent.XContentBuilder builder, org.elasticsearch.xcontent.ToXContent.Params params) throws IOException - Specified by:
toXContent
in interfaceorg.elasticsearch.xcontent.ToXContent
- Throws:
IOException
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equals
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hashCode
public int hashCode()
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