protected override IComparable GroupTyped(ColumnTyped <DataT> sourceColumn, ArrayRange sourceIndices)
{
DataT count = math.Make(sourceIndices.Count);
DataT avg = math.Zero();
foreach (var v in sourceColumn.VisitRows(sourceIndices))
{
avg = math.Add(avg, v);
}
avg = math.Div(avg, count);
DataT dev = math.Zero();
foreach (var v in sourceColumn.VisitRows(sourceIndices))
{
dev = math.Add(dev, math.SubAbs(avg, v));
}
dev = math.Div(dev, count);
return(dev);
}
protected override IComparable GroupTyped(ColumnTyped <DataT> sourceColumn, ArrayRange sourceIndices)
{
using (Profiling.GetMarker(Profiling.MarkerId.MergeDeviation).Auto())
{
DataT count = math.Make(sourceIndices.indexCount);
DataT avg = math.Zero();
foreach (var v in sourceColumn.VisitRows(sourceIndices))
{
avg = math.Add(avg, v);
}
avg = math.Div(avg, count);
DataT dev = math.Zero();
foreach (var v in sourceColumn.VisitRows(sourceIndices))
{
dev = math.Add(dev, math.SubAbs(avg, v));
}
dev = math.Div(dev, count);
return(dev);
}
}