private DoubleTimeSeries <TIndex> BinaryOperation(DoubleTimeSeries <TIndex> otherDoubleTimeSeries,
Func <double, double, double> selector)
{
if (otherDoubleTimeSeries == null)
{
throw new ArgumentNullException(nameof(otherDoubleTimeSeries));
}
if (otherDoubleTimeSeries.IsEmpty)
{
return(this);
}
if (IsEmpty)
{
throw new InvalidOperationException("TimeSeries is empty.");
}
int startTransformIndex = otherDoubleTimeSeries.Start.OffsetFrom(Start);
if (startTransformIndex < 0)
{
throw new ArgumentException(
"DoubleTimeSeries parameter instance has indices which are non-overlapping with the indices of the current instance.");
}
int endTransformIndex = otherDoubleTimeSeries.End.OffsetFrom(Start);
if (endTransformIndex > Count - 1)
{
throw new ArgumentException(
"DoubleTimeSeries parameter instance has indices which are non-overlapping with the indices of the current instance.");
}
var doubleArray = new double[Count];
for (int i = 0; i < Count; i++)
{
if (i < startTransformIndex || i > endTransformIndex)
{
doubleArray[i] = this[i];
}
else
{
int otherIndex = i - startTransformIndex;
doubleArray[i] = selector(this[i], otherDoubleTimeSeries[otherIndex]);
}
}
return(new DoubleTimeSeries <TIndex>(doubleArray, Start, IndicesLazy));
}
private DoubleTimeSeries <TIndex> Add([NotNull] DoubleTimeSeries <TIndex> doubleTimeSeries)
{
return(BinaryOperation(doubleTimeSeries, (d1, d2) => d1 + d2));
}
public override DoubleTimeSeries <TIndex> Build()
{
return(DoubleTimeSeries.FromDictionary(Data));
}