Class CdfIntegration

Method Details

• getCdf

  public double[][] getCdf(PDF pdf, boolean logAxis, int nPoints, double rMin, double rMax, boolean normalisePdf, boolean integrateToInfinite)

  Calculate the CDF by integrating the PDF in a finite interval. It is assumed the the PDF below the minimum value is 0. The algorithm will continue integrating towards infinity until the increment added is lower than a threshold or a limit of iterations is reached so that the CDF can be normalized To set these thresholds please see setDeltaThreshold(double) and setIterationLimit(int)

  Parameters:

  pdf - Probability Distribution Function

  logAxis - True if the points should be distributed logaritmically, false otherwise

  nPoints - Number of points to be calculated in the range

  rMin - Minimum value of the range, in parsecs

  rMax - Maximum value of the range, in parsecs

  Returns:

  CDF

• integrateBooleRule

  protected double integrateBooleRule(PDF pdf, double min, double max)

  Integrate the PDF over a finite interval using Boole's rule

  Parameters:

  pdf - probability distribution function to integrate

  min - Minimum value of x (in linear units)

  max - Maximum value of x (in linear units)

  Returns:

  Value of the integral of the pdf in the interval (min,max)

• integrateBooleRule

  protected double integrateBooleRule(PDF pdf, double min, double max, double pdfAtMin, double pdfAtMax)

  Integrate the PDF over a finite interval using Boole's rule This implementation uses the value of the PDF at the boundaries that has already been calculated externally, thus avoiding unnecesary calls to PDF.getUnnormalizedProbabilityAt(double)

  Parameters:

  pdf - probability distribution function to integrate

  min - Minimum value of x (in linear units)

  max - Maximum value of x (in linear units)

  pdfAtMin - Value of the PDF at min

  pdfAtMax - Value of the PDF at max

  Returns:

  Value of the integral of the pdf in the interval (min,max)

• integrateToInfinitum

  protected double integrateToInfinitum(PDF pdf, boolean logAxis, double minR, double step)

• getPercentiles

  public double[] getPercentiles(double[][] cdf, double... percentiles)

• getDeltaThreshold

  public double getDeltaThreshold()

• setDeltaThreshold

  public void setDeltaThreshold(double deltaThreshold)

• getIterationLimit

  public int getIterationLimit()

• setIterationLimit

  public void setIterationLimit(int iterationLimit)