/// <summary>
/// Assign Dates. if full period of record is requested, find
/// all series and determine period of record from the data.
/// </summary>
/// <param name="t1"></param>
/// <param name="t2"></param>
private void AssignDates(DateTime t1, DateTime t2)
{
if (t1 == TimeSeriesDatabase.MinDateTime ||
t2 == TimeSeriesDatabase.MaxDateTime)
{
Logger.WriteLine("computing composite period of record");
SeriesList sl = SeriesInExpression(exp);
var por = sl.PeriodOfRecord();
this.t1 = por.T1;
this.t2 = por.T2;
Logger.WriteLine(por.ToString());
}
else
{
this.t1 = t1;
this.t2 = t2;
}
}