/// <summary>
/// 获取结果
/// </summary>
/// <param name="time"></param>
/// <returns></returns>
public double GetY(Time time)
{
if (LsPolyFit == null)
{
throw new Exception("请Init初始化先！");
}
double xValue = time - FirstTime;
return(LsPolyFit.GetY(xValue));
}
/// <summary>
/// 拟合下一个数据。
/// </summary>
/// <param name="nextIndex">下一个编号，0为推1个单位，1为外推2个单位</param>
/// <param name="order"></param>
/// <returns></returns>
public RmsedNumeral GetNextLsPolyFitValue(double nextIndex = 0, int order = 2)
{
LsPolyFit fit = GetLsPolyFit(order);
return(new RmsedNumeral(fit.GetY(this.Count + nextIndex), fit.StdDev));
}
/// <summary>
/// 多项式拟合。
/// 参数与乘积为从低到高。
/// 注意：拟合参数数量 = 阶次 + 1
/// </summary>
/// <param name="arrayX">数组</param>
/// <param name="arrayY">数组</param>
/// <param name="order">阶次</param>
/// <returns>拟合参数</returns>
public static double[] GetFitParams(double[] arrayX, double[] arrayY, int order)
{
LsPolyFit fit = new LsPolyFit(arrayX, arrayY, order);
return(fit.FitParameters());
}
/// <summary>
/// 字符串显示
/// </summary>
/// <returns></returns>
public override string ToString()
{
return(LsPolyFit.ToString());
}
/// <summary>
/// 初始化
/// </summary>
public void Init()
{
LsPolyFit = new LsPolyFit(this.Order);
LsPolyFit.InitAndFitParams <double>(DicData, m => m);
}