Examples of org.apache.commons.math.estimation.GaussNewtonEstimator

Package org.apache.commons.math.estimation

Examples of org.apache.commons.math.estimation.GaussNewtonEstimator

org.apache.commons.math.estimation.GaussNewtonEstimator
This class implements a solver for estimation problems.
This class solves estimation problems using a weighted least squares criterion on the measurement residuals. It uses a Gauss-Newton algorithm.
@version $Revision: 990655 $ $Date: 2010-08-29 23:49:40 +0200 (dim. 29 août 2010) $ @since 1.2 @deprecated as of 2.0, everything in package org.apache.commons.math.estimation hasbeen deprecated and replaced by package org.apache.commons.math.optimization.general

      new LinearMeasurement(new double[] { 1.0, 3.0 },
                            new EstimatedParameter[] { p[0], p[1] },
                            4.0)
    });


    GaussNewtonEstimator estimator = new GaussNewtonEstimator(100, 1.0e-6, 1.0e-6);
    estimator.estimate(problem);
    assertTrue(estimator.getRMS(problem) > 0.1);


  }

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      circle.addPoint( 50.0,  -6.0);
      circle.addPoint(110.0, -20.0);
      circle.addPoint( 35.0,  15.0);
      circle.addPoint( 45.0,  97.0);
      try {
        GaussNewtonEstimator estimator = new GaussNewtonEstimator(4, 1.0e-14, 1.0e-14);
        estimator.estimate(circle);
        fail("an exception should have been caught");
      } catch (EstimationException ee) {
        // expected behavior
      } catch (Exception e) {
        fail("wrong exception type caught");

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      circle.addPoint( 30.0,  68.0);
      circle.addPoint( 50.0,  -6.0);
      circle.addPoint(110.0, -20.0);
      circle.addPoint( 35.0,  15.0);
      circle.addPoint( 45.0,  97.0);
      GaussNewtonEstimator estimator = new GaussNewtonEstimator(100, 1.0e-10, 1.0e-10);
      estimator.estimate(circle);
      double rms = estimator.getRMS(circle);
      assertEquals(1.768262623567235,  Math.sqrt(circle.getM()) * rms,  1.0e-10);
      assertEquals(69.96016176931406, circle.getRadius(), 1.0e-10);
      assertEquals(96.07590211815305, circle.getX(),      1.0e-10);
      assertEquals(48.13516790438953, circle.getY(),      1.0e-10);
    }

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      {-0.048837, -0.077056}, {-0.127729, -0.075338}, {-0.221271, -0.067526}
    };
    for (int i = 0; i < points.length; ++i) {
      circle.addPoint(points[i][0], points[i][1]);
    }
    GaussNewtonEstimator estimator = new GaussNewtonEstimator(100, 1.0e-6, 1.0e-6);
    try {
        estimator.estimate(circle);
        fail("an exception should have been caught");
    } catch (EstimationException ee) {
        // expected behavior
    } catch (Exception e) {
        fail("wrong exception type caught");

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Related Classes of org.apache.commons.math.estimation.GaussNewtonEstimator

org.apache.commons.math.estimation.GaussNewtonEstimatorTest

org.apache.commons.math.linear.ArrayRealVector

org.apache.commons.math.linear.LUDecompositionImpl

org.apache.commons.math.linear.RealMatrix

org.apache.commons.math.linear.RealMatrixImpl

org.apache.commons.math.linear.RealVector

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