private double GetCalibratedValue(double keyValue, double epsilon = Extensions.EPSILON)
{
if (fDataRows != null && fDataRows.Length > 0)
{
double prevKey = double.NaN;
double prevValue = double.NaN;
for (int i = 0; i < fDataRows.Length; i++)
{
var row = fDataRows[i];
double currKey = Convert.ToDouble(row[fKeyField]);
double currValue = Convert.ToDouble(row[fValueField]);
if (Extensions.Equals(currKey, keyValue, epsilon))
{
return(currValue);
}
else
{
if (i > 0)
{
if (Extensions.GreaterThan(keyValue, prevKey, epsilon) && Extensions.LessThan(keyValue, currKey, epsilon))
{
double hk = (keyValue - prevKey) / (currKey - prevKey);
double k = prevValue + (currValue - prevValue) * hk;
return(k);
}
}
}
prevKey = currKey;
prevValue = currValue;
}
return(double.NaN);
}
else
{
throw new ArgumentException("Table is empty");
}
}