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• Recall.scala

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fregata.metrics.classification.Recall.scala Maven / Gradle / Ivy

package fregata.metrics.classification

import fregata.Num

/**
 * Created by takun on 16/6/1.
 */
object Recall {

  def compute(p:Double,y:Double) = if( y == p ) 1 else 0

  def of(it:Iterable[(Num,Num)]) = {
    var sum = 0d
    var size = 0
    it.foreach{
        case (p,y) =>
          if (p == 1) {
            sum += compute(p, y)
            size += 1
          }
    }
    sum / size
  }
}