Class GaussianFitter

java.lang.Object
org.apache.commons.math.optimization.fitting.GaussianFitter

public class GaussianFitter extends Object
Fits points to a Gaussian function (that is, a GaussianFunction).

Usage example:

   GaussianFitter fitter = new GaussianFitter(
     new LevenbergMarquardtOptimizer());
   fitter.addObservedPoint(4.0254623,  531026.0);
   fitter.addObservedPoint(4.03128248, 984167.0);
   fitter.addObservedPoint(4.03839603, 1887233.0);
   fitter.addObservedPoint(4.04421621, 2687152.0);
   fitter.addObservedPoint(4.05132976, 3461228.0);
   fitter.addObservedPoint(4.05326982, 3580526.0);
   fitter.addObservedPoint(4.05779662, 3439750.0);
   fitter.addObservedPoint(4.0636168,  2877648.0);
   fitter.addObservedPoint(4.06943698, 2175960.0);
   fitter.addObservedPoint(4.07525716, 1447024.0);
   fitter.addObservedPoint(4.08237071, 717104.0);
   fitter.addObservedPoint(4.08366408, 620014.0);
  GaussianFunction fitFunction = fitter.fit();
 
Since:
2.2
Version:
$Revision: 1073158 $ $Date: 2011-02-21 22:46:52 +0100 (lun. 21 févr. 2011) $
See Also:
  • Constructor Details

  • Method Details

    • addObservedPoint

      public void addObservedPoint(double x, double y)
      Adds point (x, y) to list of observed points with a weight of 1.0.
      Parameters:
      x - x point value
      y - y point value
    • addObservedPoint

      public void addObservedPoint(double weight, double x, double y)
      Adds point (x, y) to list of observed points with a weight of weight.
      Parameters:
      weight - weight assigned to point
      x - x point value
      y - y point value
    • fit

      Fits Gaussian function to the observed points.
      Returns:
      Gaussian function best fitting the observed points
      Throws:
      FunctionEvaluationException - if CurveFitter.fit throws it
      OptimizationException - if CurveFitter.fit throws it
      IllegalArgumentException - if CurveFitter.fit throws it
      See Also:
    • createParametersGuesser

      protected GaussianParametersGuesser createParametersGuesser(WeightedObservedPoint[] observations)
      Factory method to create a GaussianParametersGuesser instance initialized with the specified observations.
      Parameters:
      observations - points used to initialize the created GaussianParametersGuesser instance
      Returns:
      new GaussianParametersGuesser instance