/// <summary>
/// Changes the zoomlevel of a timespanseries
/// </summary>
/// <param name="Data"></param>
/// <param name="NewZoomLevel"></param>
/// <param name="Accumulate"></param>
/// <returns></returns>
public static IEnumerable <TimeSpanValue> ChangeZoomLevel(TimeSpanSeries Data, TimeStepUnit NewZoomLevel, bool Accumulate)
{
if (Data.TimeStepSize <= NewZoomLevel)
{
return(null);
}
List <TimeSpanValue> ToReturn = new List <TimeSpanValue>();
DateTime start = Data.StartTime;
DateTime end = Data.EndTime;
TimeSpanValue CurrentValue = new TimeSpanValue(GetTimeOfFirstTimeStep(start, NewZoomLevel), GetTimeOfFirstTimeStep(start, NewZoomLevel).AddTimeStepUnit(NewZoomLevel), 0);
double currentcount = 0;
foreach (var v in Data.Items.Where(dv => dv.Value != Data.DeleteValue))
{
if (CurrentValue.StartTime <= v.StartTime & v.StartTime <= CurrentValue.EndTime)
{
if (CurrentValue.EndTime >= v.EndTime) //We are still within the timespan
{
CurrentValue.Value += v.Value;
currentcount++;
}
else //We exceed the timespan
{
double outsidefraction = (v.EndTime.Subtract(CurrentValue.EndTime).TotalDays / v.EndTime.Subtract(v.StartTime).TotalDays);
CurrentValue.Value += v.Value * (1 - outsidefraction);
currentcount += 1 - outsidefraction;
if (!Accumulate & currentcount != 0)
{
CurrentValue.Value /= currentcount;
}
ToReturn.Add(CurrentValue);
CurrentValue = new TimeSpanValue(CurrentValue.EndTime, CurrentValue.EndTime.AddTimeStepUnit(NewZoomLevel), v.Value * outsidefraction);
currentcount = outsidefraction;
}
}
else
{
if (!Accumulate & currentcount != 0)
{
CurrentValue.Value /= currentcount;
}
ToReturn.Add(CurrentValue);
CurrentValue = new TimeSpanValue(GetTimeOfFirstTimeStep(v.StartTime, NewZoomLevel), GetTimeOfFirstTimeStep(v.StartTime, NewZoomLevel).AddTimeStepUnit(NewZoomLevel), v.Value);
currentcount = 1;
}
}
if (!Accumulate & currentcount != 0)
{
CurrentValue.Value /= currentcount;
}
ToReturn.Add(CurrentValue);
return(ToReturn);
}
/// <summary>
/// Checks if there are any holes in the data series. Returns the active periods.
/// </summary>
/// <param name="data"></param>
/// <param name="Interval"></param>
/// <returns></returns>
public static TimeSpanSeries GetActivePeriods(TimeStampSeries data, TimeSpan Interval)
{
TimeSpanSeries toreturn = new TimeSpanSeries();
if (data.Count > 0)
{
TimeSpanValue currentvalue = new TimeSpanValue(data.StartTime, data.StartTime, 1);
for (int i = 0; i < data.Count; i++)
{
if (data.Items[i].Time <= currentvalue.EndTime.Add(Interval))
{
currentvalue.EndTime = data.Items[i].Time;
}
else
{
toreturn.Items.Add(currentvalue);
currentvalue = new TimeSpanValue(data.Items[i].Time, data.Items[i].Time, 1);
}
}
toreturn.Items.Add(currentvalue);
}
return(toreturn);
}
/// <summary>
/// Returns the appropriate time step for a given time period
/// </summary>
/// <param name="Start"></param>
/// <param name="End"></param>
/// <returns></returns>
public static TimeStepUnit GetTimeStep(TimeSpanValue value)
{
return(GetTimeStep(value.StartTime, value.EndTime));
}