本文整理汇总了Java中org.apache.commons.math3.optimization.PointValuePair.getPointRef方法的典型用法代码示例。如果您正苦于以下问题：Java PointValuePair.getPointRef方法的具体用法？Java PointValuePair.getPointRef怎么用？Java PointValuePair.getPointRef使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.commons.math3.optimization.PointValuePair的用法示例。
在下文中一共展示了PointValuePair.getPointRef方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: testCircleFitting
import org.apache.commons.math3.optimization.PointValuePair; //导入方法依赖的package包/类
@Test
public void testCircleFitting() {
CircleScalar circle = new CircleScalar();
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);
NonLinearConjugateGradientOptimizer optimizer =
new NonLinearConjugateGradientOptimizer(ConjugateGradientFormula.POLAK_RIBIERE,
new SimpleValueChecker(1e-30, 1e-30),
new BrentSolver(1e-15, 1e-13));
PointValuePair optimum =
optimizer.optimize(100, circle, GoalType.MINIMIZE, new double[] { 98.680, 47.345 });
Vector2D center = new Vector2D(optimum.getPointRef()[0], optimum.getPointRef()[1]);
Assert.assertEquals(69.960161753, circle.getRadius(center), 1.0e-8);
Assert.assertEquals(96.075902096, center.getX(), 1.0e-8);
Assert.assertEquals(48.135167894, center.getY(), 1.0e-8);
}
示例2: evaluate
import org.apache.commons.math3.optimization.PointValuePair; //导入方法依赖的package包/类
/**
* Evaluate all the non-evaluated points of the simplex.
*
* @param evaluationFunction Evaluation function.
* @param comparator Comparator to use to sort simplex vertices from best to worst.
* @throws org.apache.commons.math3.exception.TooManyEvaluationsException
* if the maximal number of evaluations is exceeded.
*/
public void evaluate(final MultivariateFunction evaluationFunction,
final Comparator<PointValuePair> comparator) {
// Evaluate the objective function at all non-evaluated simplex points.
for (int i = 0; i < simplex.length; i++) {
final PointValuePair vertex = simplex[i];
final double[] point = vertex.getPointRef();
if (Double.isNaN(vertex.getValue())) {
simplex[i] = new PointValuePair(point, evaluationFunction.value(point), false);
}
}
// Sort the simplex from best to worst.
Arrays.sort(simplex, comparator);
}