public double EvaluateDouble(Report rpt, Row row)
{
bool bSave = true;
IEnumerable re = this.GetDataScope(rpt, row, out bSave);
if (re == null)
{
return(double.NaN);
}
ODouble v = GetValueDouble(rpt);
if (v != null)
{
return(v.d);
}
double sum = 0;
double temp;
foreach (Row r in re)
{
temp = _Expr.EvaluateDouble(rpt, r);
if (temp.CompareTo(double.NaN) != 0)
{
sum += temp;
}
}
if (bSave)
{
SetValue(rpt, sum);
}
return(sum);
}
public double EvaluateDouble(Report rpt, Row row)
{
bool bSave = true;
IEnumerable re = this.GetDataScope(rpt, row, out bSave);
if (re == null)
{
return(double.NaN);
}
ODouble od = GetValue(rpt);
if (od != null)
{
return(od.d);
}
double sum = 0;
double sum2 = 0;
int count = 0;
double temp;
foreach (Row r in re)
{
temp = _Expr.EvaluateDouble(rpt, r);
if (temp.CompareTo(double.NaN) != 0)
{
sum += temp;
sum2 += (temp * temp);
count++;
}
}
double result;
if (count > 1)
{
result = Math.Sqrt((count * sum2 - sum * sum) / (count * (count - 1)));
}
else
{
result = double.NaN;
}
if (bSave)
{
SetValue(rpt, result);
}
return(result);
}
