0
public double calculateStdErrorEst()
{
double see = 0;
double residualSquare = 0;
CultureInfo culture = new CultureInfo("en-US");
List<double> residualTotal = new List<double>();
try
{
for (int i = 0; i < stockPctReturns.Count; i++)
{
// square root of all sums of predicted - actual or market - stock
residualSquare = Math.Sqrt(Convert.ToDouble((marketPctReturns.ElementAt(i) - stockPctReturns.ElementAt(i)), culture));
residualTotal.Add(Math.Round(residualSquare, 2, MidpointRounding.AwayFromZero));
}
see = residualTotal.Sum()/(stockPctReturns.Count - 2);
see = Math.Sqrt(see);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return Math.Round(see, 2, MidpointRounding.AwayFromZero);
}
正如你所看到的,我試圖將值減小到小數點,以便讓它們與它們一起工作,但無論我嘗試了什麼,繼續獲得NaN
作爲唯一的結果。我在這裏錯過了什麼嗎?執行計算,但只得到NaN結果
是什麼stockPctReturns和最新計數? –
最佳猜想:你正試圖從負值獲得'Math.Sqrt'。 – MarcinJuraszek
'Math.Sqrt'方法爲負數返回'NaN'。 – Dmitry