Package nz.org.riskscape.defaults.function

Class AALHazardBasedFunction

java.lang.Object
nz.org.riskscape.engine.function.BaseRealizableFunction
nz.org.riskscape.defaults.function.AALHazardBasedFunction
All Implemented Interfaces:
nz.org.riskscape.engine.rl.agg.AggregationFunction, nz.org.riskscape.engine.rl.RealizableFunction
public class AALHazardBasedFunction extends nz.org.riskscape.engine.function.BaseRealizableFunction implements nz.org.riskscape.engine.rl.agg.AggregationFunction

Calculates an AAL for a hazard-based probabilistic data. We have a series of x,y datapoints, representing the loss and EP (Exceedance Probability). The AAL is the area under the x,y "curve". NB: we just connect the data-points via a straight-line (i.e. piecewise linear data), which simplifies the AAL calculation.

For the AAL calculation we use x=EP, y=loss. This seems to produce better results, because the spacing between X datapoints is consistent. Whereas if we used x=loss, y=EP, if we get duplicate losses then we end up with a zero AAL for the duplicates (i.e. there's no area under the curve). Refer GL993 for more details.

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static interface 
    AALHazardBasedFunction.LocalProblems
     

    Nested classes/interfaces inherited from interface nz.org.riskscape.engine.rl.RealizableFunction

    nz.org.riskscape.engine.rl.RealizableFunction.MetadataIdentifiedRealizableFunction

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int
    MIN_NUM_EVENTS
     
    static final com.google.common.collect.Range<Double>
    PROBABILITY_RANGE
     
    static final AALHazardBasedFunction.LocalProblems
    PROBLEMS
     

    Fields inherited from class nz.org.riskscape.engine.function.BaseRealizableFunction

    arguments, returnType

  • Constructor Summary

    Constructors
    Constructor
    Description
    AALHazardBasedFunction()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    nz.org.riskscape.engine.function.RiskscapeFunction
    asFunction()
     
    nz.org.riskscape.problem.ResultOrProblems<nz.org.riskscape.engine.rl.agg.RealizedAggregateExpression>
    realize(nz.org.riskscape.engine.rl.RealizationContext context, nz.org.riskscape.engine.types.Type inputType, nz.org.riskscape.rl.ast.FunctionCall fc)
     
    nz.org.riskscape.problem.ResultOrProblems<nz.org.riskscape.engine.function.RiskscapeFunction>
    realize(nz.org.riskscape.engine.rl.RealizationContext context, nz.org.riskscape.rl.ast.FunctionCall fc, List<nz.org.riskscape.engine.types.Type> givenTypes)
     

    Methods inherited from class nz.org.riskscape.engine.function.BaseRealizableFunction

    build, builtin, getArguments, getReturnType, identified

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    Methods inherited from interface nz.org.riskscape.engine.rl.agg.AggregationFunction

    getArguments, getReturnType

    Methods inherited from interface nz.org.riskscape.engine.rl.RealizableFunction

    isDoTypeAdaptation

  • Field Details

  • Constructor Details

    • AALHazardBasedFunction

      public AALHazardBasedFunction()

  • Method Details

    • realize

      public nz.org.riskscape.problem.ResultOrProblems<nz.org.riskscape.engine.function.RiskscapeFunction> realize(nz.org.riskscape.engine.rl.RealizationContext context, nz.org.riskscape.rl.ast.FunctionCall fc, List<nz.org.riskscape.engine.types.Type> givenTypes)
      Specified by:
      realize in interface nz.org.riskscape.engine.rl.RealizableFunction
      Overrides:
      realize in class nz.org.riskscape.engine.function.BaseRealizableFunction

    • asFunction

      public nz.org.riskscape.engine.function.RiskscapeFunction asFunction()
      Overrides:
      asFunction in class nz.org.riskscape.engine.function.BaseRealizableFunction

    • realize

      public nz.org.riskscape.problem.ResultOrProblems<nz.org.riskscape.engine.rl.agg.RealizedAggregateExpression> realize(nz.org.riskscape.engine.rl.RealizationContext context, nz.org.riskscape.engine.types.Type inputType, nz.org.riskscape.rl.ast.FunctionCall fc)
      Specified by:
      realize in interface nz.org.riskscape.engine.rl.agg.AggregationFunction