public virtual void UpdateDataMinMax(DataTable table)
{
if (Chart.Plot.XAxis1 == null)
{
return;
}
const double PWR = 2;
double avg = 0;
double stdDev = 0;
double min = double.MaxValue;
double max = double.MinValue;
double dev = 0;
int start = Chart.GetDataIndex(Chart.Plot.XAxis1.WorldMin);
int end = Chart.GetDataIndex(Chart.Plot.XAxis1.WorldMax);
int step = Math.Max((end - start) / 8192, 1);
int numSteps = (((end - start) + (step - 1)) / step);
int count = 0;
if (numSteps > 0)
{
// Calculate the average, std dev, min, and max
for (int i = start; (table.Rows.Count > i) && (i <= end); i += step)
{
double val = NPlot.Utils.ToDouble(table.Rows[i][Expression]);
if (double.IsNaN(val))
{
continue;
}
avg += (val - avg) / ++count;
dev += Math.Pow((val - avg), 2);
min = (val < min) ? val : min;
max = (val > max) ? val : max;
}
// Set the chart to show the entire data range
PlotYAxis.WorldMin = avg - ((avg - min) * 1.1);
PlotYAxis.WorldMax = avg + ((max - avg) * 1.1);
// When plotting time, hide some of the outliers
if (Chart.XAxis.Equals("Time"))
{
dev = Math.Sqrt(dev / count);
PlotYAxis.WorldMin = Math.Max(PlotYAxis.WorldMin, avg - (dev * 6));
PlotYAxis.WorldMax = Math.Min(PlotYAxis.WorldMax, avg + (dev * 6));
}
}
}
public virtual void UpdateDataMinMax(DataTable table)
{
if (Chart.Plot.XAxis1 == null)
{
return;
}
const double PWR = 2;
double avg = 0;
double stdDev = 0;
double min = double.MaxValue;
double max = double.MinValue;
double dev = 0;
int start = Chart.GetDataIndex(Chart.Plot.XAxis1.WorldMin);
int end = Chart.GetDataIndex(Chart.Plot.XAxis1.WorldMax);
int step = Math.Max((end - start) / 4096, 1);
int numSteps = (((end - start) + (step - 1)) / step);
int count = 0;
if (numSteps > 0)
{
// Calculate the average first
for (int i = start; i <= end; i += step)
{
double val = NPlot.Utils.ToDouble(table.Rows[i][Expression]);
if (double.IsNaN(val))
{
continue;
}
avg += (val - avg) / ++count;
dev += Math.Pow((val - avg), 2);
min = (val < min) ? val : min;
max = (val > max) ? val : max;
}
dev = Math.Sqrt(dev / count);
PlotYAxis.WorldMin = Math.Max(avg - ((avg - min) * 1.1), avg - (dev * 4));
PlotYAxis.WorldMax = Math.Min(avg + ((max - avg) * 1.1), avg + (dev * 4));
}
}
