private void setStackData()
{
this.EnergyHistogramDatumFirst = SemanticHistogramDatum.GetStackedTimeInstance(this.SelectedSemanticLinks[0], this.TripDirection);
this.EnergyHistogramDatumSecond = SemanticHistogramDatum.GetStackedTimeInstance(this.SelectedSemanticLinks[1], this.TripDirection);
}