private void PrepareWeight()
{
if (!View.ActualSeries.Any(x => x is IScatterSeriesView || x is IHeatSeriesView)) return;
var vs = View.ActualSeries
.Select(x => x.ActualValues.GetTracker(x).WLimit)
.DefaultIfEmpty(new CoreLimit()).ToArray();
WLimit = new CoreLimit(vs.Select(x => x.Min).DefaultIfEmpty(0).Min(),
vs.Select(x => x.Max).DefaultIfEmpty(0).Max());
}