// Calculate a new candidate value for this quantity as
// an average of its expressions. Perform all calculations
// using the log to limit propagation of truncation errors.
public void CalcCandidate()
{
if (!_isExact && _expressionList.Count > 0)
{
_candidate.Log = _expressionList.AverageLog();
// keep the calculated value within the fences
if (_uncertainty.Value != 0)
{
if (_candidate.Log < _lowfence.Log)
{
_candidate.Log = _lowfence.Log;
}
else if (_candidate.Log > _highfence.Log)
{
_candidate.Log = _highfence.Log;
}
}
}
else
{
_candidate = new CNumber(_number);
}
}
