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Added a unit test for CoxPH #446

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Added a unit test for CoxPH #446

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87b06b3
Added a test
abhiwand Jun 13, 2016
3d03453
Merge branch 'master' of github.com:trustedanalytics/atk into DPNG-5990
abhiwand Jun 13, 2016
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13 changes: 13 additions & 0 deletions engine-plugins/model-plugins/src/test/scala/org/apache/spark/ml/regression/CoxTest.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -15,8 +15,10 @@
*/
package org.apache.spark.ml.regression

import org.apache.spark.frame.FrameRdd
import org.apache.spark.mllib.linalg.DenseVector
import org.scalatest.Matchers
import org.trustedanalytics.atk.domain.schema.{DataTypes, Column, FrameSchema}
import org.trustedanalytics.atk.testutils.MatcherUtils._
import org.trustedanalytics.atk.testutils.TestingSparkContextFlatSpec
import breeze.linalg.{ DenseVector => BDV, * }
Expand Down Expand Up @@ -90,4 +92,15 @@ class CoxTest extends TestingSparkContextFlatSpec with Matchers {
gradient.toArray should equalWithTolerance(estimatedGradient.toArray)
informationMatrix shouldBe estimatedInformationMatrix +- 1e-6
}

"predict" should "compute predicted hazard ratio" in {
val features = new DenseVector(Array(27.9))
val estimatedPredictedOutput = 1.00261043677

val coxModel = new CoxModel("coxModelId",beta=new DenseVector(Array(-0.03351902788328871)), meanVector = new DenseVector(Array(27.977777777777778)))
val predictedOutput = coxModel.predict(features, coxModel.meanVector)

predictedOutput shouldBe estimatedPredictedOutput +- 1e-6
}

}