public static double Calculation(double[] realValue, double[] forecastValue)
{
double[] newReal = ArrayBased.ShortenRealValueArray(realValue, forecastValue);
int n = newReal.Length;
int m = forecastValue.Length;
if (0 == n || 0 == m)
{
return(-1); // throw new EmptyParameterArray();
}
//Sum of square differences
double sumOfDifferences =
newReal.Zip(forecastValue, (r, f) => Math.Pow(r - f, 2)).Sum();
return(sumOfDifferences / n);
}
public static double Calculation(double[] realValue, double[] forecastValue)
{
double[] newReal = ArrayBased.ShortenRealValueArray(realValue, forecastValue);
int n = newReal.Length;
int m = forecastValue.Length;
if (0 == n || 0 == m)
{
return(-1); // throw new EmptyParameterArray();
}
//Check if there's any 0 on the realValue array
if (newReal.Contains(0.0))
{
return(-1); // throw new ZeroInputArray();
}
//Sum of absolute differences
double sumOfDifferences = newReal.Zip(forecastValue, (r, f) => Math.Abs(r - f) / Math.Abs(r)).Sum();
return(sumOfDifferences / n);
}