public T?MeanExpWeighted()
{
if (!Rows.Any())
{
return(null);
}
var rows = Rows;
DateTime start = DateTime.MinValue;
DateTime stop = rows.Last().TimeUtc;
if (StartTime != null)
{
start = StartTime.Value;
}
if (NextRow != null && EndTime != null)
{
stop = EndTime.Value;
}
var diff = stop - start;
var timeSpanSubGroup = TimeSpan.FromTicks((diff.Ticks + (NumberOfExpFactors * 2)) / ExponentialFactors.Length);
var newSerie = new QuerySerie <T>(Rows, start, stop)
{
PreviousRow = PreviousRow, NextRow = NextRow
};
var subGroups =
newSerie.Group(g => g.ByTime.Span(timeSpanSubGroup).Aggregate(f => f.MeanByTimeIncludePreviousAndNext()))
.RemoveNulls();
if (subGroups.Rows.Count != ExponentialFactors.Length)
{
Logger.Warn($"Subgroups count is {subGroups.Rows.Count}, instead of {ExponentialFactors.Length}");
return(subGroups.MeanByTime()?.ToType <T>());
}
Debug.Assert(subGroups.Rows.Count == ExponentialFactors.Length);
var subRows = subGroups.Rows;
double sum = 0;
for (int i = 0; i < subRows.Count; i++)
{
sum += subRows[i].Value.ToDouble() * ExponentialFactors[i];
}
double result = sum / ExpSum;
return(result.ToType <T>());
}
public IQuerySerie <T> CalcValue(Func <T, T> calculationFunc, string newSerieName = null)
{
var rows = new List <ISingleDataRow <T> >(Rows.Count);
if (Rows.Any())
{
rows.AddRange(Rows.Select(row => new SingleDataRow <T>(row.TimeUtc, calculationFunc(row.Value))));
}
var newSerie = new QuerySerie <T>(rows, this);
if (newSerieName != null)
{
newSerie.Name = newSerieName;
}
return(newSerie);
}
public override IObjectQuerySerieBase GetOrCreateSerie(string name)
{
var serie = TryGetSerie(name);
if (serie == null)
{
var firstSerie = Series.Values.FirstOrDefault();
if (firstSerie != null)
{
var newSerie = new QuerySerie <T>(new List <ISingleDataRow <T> >(firstSerie.Rows.Select(i => new SingleDataRow <T>(i.Key, default(T)))), firstSerie.StartTime, firstSerie.EndTime);
AddSerie(newSerie);
serie = newSerie;
}
}
return(serie);
}
