Daniel Marcous created SPARK-13042:
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Summary: Adding Specificity metric (= true negative rate) to
MulticlassMetrics.scala
Key: SPARK-13042
URL: https://issues.apache.org/jira/browse/SPARK-13042
Project: Spark
Issue Type: Improvement
Components: MLlib
Reporter: Daniel Marcous
Priority: Minor
Fix For: 1.6.0
Adding Specificity metric (= true negative rate) to MulticlassMetrics.scala
1. Add specificity calculations:
pecificity (SPC) or true negative rate
SPC = TN / N = TN / (TN+FP)
False Positive Rate (FPR)
FPR = FP / N = FP / (FP + TN) = 1-SPC
SPC = 1 - FPR
2. Add specificity tests to :
mllib/src/test/scala/org/apache/spark/mllib/evaluation/MulticlassMetricsSuite.scala
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