protected override void Postprocess(IDictionary <object, HistogramSeries> seriesSet)
{
if (_data == null || _data.Count == 0)
{
return;
}
_intervals = GetHistogramInterval(_data.Min(), _data.Max(), _data.Count);
foreach (var entry in seriesSet)
{
var series = entry.Value;
if (series.Items.Count > 0)
{
throw new ArgumentException("-Data and the other data items cannot be specify at the same time");
}
// Grouping is not supported in HistogramSeries
var bins = HistogramSeriesHelpers.Collect(_data, _intervals, _normalize);
var s = _intervals.AdjustedLower;
for (var i = 0; i < _intervals.BinCount; ++i)
{
var item = new HistogramItem(s, s + _intervals.BinWidth, bins[i] * _intervals.BinWidth);
series.Items.Add(item);
s += _intervals.BinWidth;
}
}
}
protected void SetCategories(HistogramInterval h)
{
_categories = new string[h.BinCount];
for (var i = 0; i < h.BinCount; ++i)
{
_categories[i] = $"{Math.Round(h.AdjustedLower + i * h.BinWidth, 5)} - {Math.Round(h.AdjustedLower + (i + 1) * h.BinWidth, 5)}";
}
}
// Histogram
private static Tuple <int[], int> CollectHistogram(IList <MetaNum> data, HistogramInterval intervals)
{
var result = new int[intervals.BinCount];
var total = 0;
foreach (var value in data)
{
if (TypeTrait <MetaNum> .IsNaN(value))
{
continue;
}
var bin = (int)Math.Floor(((double)value - intervals.AdjustedLower) / intervals.BinWidth);
++result[bin];
++total;
}
return(Tuple.Create(result, total));
}
