是否有一种方法可以强制Apache通用数学通过原点(0,0)拟合形式为[y = mx + 0
)的线性曲线。到目前为止,我已经使用了PolynomialCurveFitter和SimpleCurveFitter,但是它们都不返回通过原点的结果。例如:
final WeightedObservedPoints wopts = new WeightedObservedPoints();
//Add observed points to wopts:
...
final PolynomialCurveFitter curveFitter = PolynomialCurveFitter.create(1);
double[] coeff = {0.0, 042}; //y = 0.042x + 0
curveFitter.withStartPoint(coeff);
final double[] bestPrediction = curveFitter.fit(wopts.toList());
但是bestPrediction [0]不是0.0任何提示将不胜感激。
在此行:
double[] coeff = {0.0, 042};
您使用内部转换为双精度值octal integer的042
8*4 + 2
(即34.0
)。
将行定义为:
double[] coeff = {0.0, 0.42};