protected override IComparable GroupTyped(ColumnTyped <DataT> sourceColumn, ArrayRange sourceIndices)
{
long count = sourceIndices.Count;
DataT[] d = new DataT[count];
int i = 0;
foreach (var v in sourceColumn.VisitRows(sourceIndices))
{
d[i] = v;
++i;
}
Array.Sort(d, Comparer.Ascending <DataT>());
DataT median;
long mid = count / 2;
if (count % 2 == 0)
{
median = math.Div(math.Add(d[mid - 1], d[mid]), math.Make(2));
}
else
{
median = d[mid];
}
return(median);
}
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)
{
DataT result = math.Zero();
foreach (var v in sourceColumn.VisitRows(sourceIndices))
{
result = math.Add(result, v);
}
result = math.Div(result, math.Make(sourceIndices.Count));
return(result);
}
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);
}
}
protected override IComparable GroupTyped(ColumnTyped <DataT> sourceColumn, ArrayRange sourceIndices)
{
using (Profiling.GetMarker(Profiling.MarkerId.MergeAverage).Auto())
{
DataT result = math.Zero();
foreach (var v in sourceColumn.VisitRows(sourceIndices))
{
result = math.Add(result, v);
}
result = math.Div(result, math.Make(sourceIndices.indexCount));
return(result);
}
}
