Package org.djutils.stats.summarizers

Class TimestampWeightedTally

java.lang.Object
org.djutils.stats.summarizers.WeightedTally
org.djutils.stats.summarizers.TimestampWeightedTally
All Implemented Interfaces:
Serializable, Statistic, TallyStatistic
Direct Known Subclasses:
EventBasedTimestampWeightedTally
public class TimestampWeightedTally extends WeightedTally
The TimestampWeightedTally class defines a time-weighted tally based on timestamped data. The difference with a normal time-weighed tally is that the weight of a value is only known at the occurrence of the next timestamp. Furthermore, a last timestamp needs to be specified to determine the weight of the last value. Timestamps can be Number based or Calendar based.

Copyright (c) 2020-2025 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See for project information https://simulation.tudelft.nl. The DSOL project is distributed under a three-clause BSD-style license, which can be found at https://simulation.tudelft.nl/dsol/3.0/license.html.

Author:
Alexander Verbraeck
See Also:

  • Constructor Details

    • TimestampWeightedTally

      public TimestampWeightedTally(String description)
      constructs a new TimestampWeightedTally with a description.
      Parameters:
      description - the description of this TimestampWeightedTally

  • Method Details

    • initialize

      public void initialize()
      Description copied from interface: Statistic
      Initialize the statistic.
      Specified by:
      initialize in interface Statistic
      Overrides:
      initialize in class WeightedTally

    • isActive

      public boolean isActive()
      Return whether the statistic is active (accepting observations) or not.
      Returns:
      whether the statistic is active (accepting observations) or not

    • endObservations

      public void endObservations(Number timestamp)
      End the observations and closes the last interval of observations. After ending, no more observations will be accepted. Calling this method will create an extra observation, and corresponding events for the EventBased implementations of this interface will be called.
      Parameters:
      timestamp - the Number object representing the final timestamp

    • endObservations

      public void endObservations(Calendar timestamp)
      End the observations and closes the last interval of observations. After ending, no more observations will be accepted. Calling this method will create an extra observation, and corresponding events for the EventBased implementations of this interface will be called.
      Parameters:
      timestamp - the Calendar object representing the final timestamp

    • getLastValue

      public double getLastValue()
      Return the last observed value.
      Returns:
      the last observed value

    • register

      public double register(Calendar timestamp, double value)
      Process one observed Calender-based value. The time used will be the Calendar's time in milliseconds. Silently ignore when a value is registered, but tally is not active, i.e. when endObservations() has been called.
      Parameters:
      timestamp - the Calendar object representing the timestamp
      value - the value to process
      Returns:
      the value
      Throws:
      NullPointerException - when timestamp is null
      IllegalArgumentException - when value is NaN
      IllegalArgumentException - when given timestamp is before last timestamp

    • register

      public double register(Number timestamp, double value)
      Process one observed Number-based value. Silently ignore when a value is registered, but tally is not active, i.e. when endObservations() has been called.
      Parameters:
      timestamp - the object representing the timestamp
      value - the value to process
      Returns:
      the value
      Throws:
      NullPointerException - when timestamp is null
      IllegalArgumentException - when value is NaN or timestamp is NaN
      IllegalArgumentException - when given timestamp is before last timestamp

    • register

      public double register(double timestamp, double value)
      Explicit;y override the double value method signature of WeightedTally to call the right method.
      Process one observed double value. Silently ignore when a value is registered, but tally is not active, i.e. when endObservations() has been called.
      Overrides:
      register in class WeightedTally
      Parameters:
      timestamp - the object representing the timestamp
      value - the value to process
      Returns:
      the value
      Throws:
      NullPointerException - when timestamp is null
      IllegalArgumentException - when value is NaN or timestamp is NaN
      IllegalArgumentException - when given timestamp is before last timestamp

    • registerValue

      protected double registerValue(Number timestamp, double value)
      Process one observed Number-based value. Silently ignore when a value is registered, but tally is not active, i.e. when endObservations() has been called.
      Parameters:
      timestamp - the object representing the timestamp
      value - the value to process
      Returns:
      the value
      Throws:
      NullPointerException - when timestamp is null
      IllegalArgumentException - when value is NaN or timestamp is NaN
      IllegalArgumentException - when given timestamp is before last timestamp

    • reportHeader

      public static String reportHeader()
      Return a string representing a header for a textual table with a monospaced font that can contain multiple statistics.
      Returns:
      header for the textual table.

    • reportLine

      public String reportLine()
      Description copied from interface: Statistic
      Return a string representing a line with important statistics values for this statistic, for a textual table with a monospaced font that can contain multiple statistics.
      Specified by:
      reportLine in interface Statistic
      Overrides:
      reportLine in class WeightedTally
      Returns:
      line with most important values of the statistic

    • reportFooter

      public static String reportFooter()
      Return a string representing a footer for a textual table with a monospaced font that can contain multiple statistics.
      Returns:
      footer for the textual table

    • toString

      public String toString()
      Overrides:
      toString in class WeightedTally