Bug Report

Issue: Updating a signal of the same size causes the exception: 'lastIndex cannot exceed the dimensions of the existing Ys array'. I believe the Update method with 1 parameter is passing newData.Length as the lastIndex parameter to the Update method with 4 parameters. The latter method is comparing lastIndex to oldData.Length - 1 which will never match if both arrays are the same size.

Reproducing: Generate signal of any size. AddSignal to a plot, Update using same signal.

double[] y = ScottPlot.DataGen.Sin(100, 2, 0, 1, 0);
var scatterPlot = plotWindow.Edit.Plot.AddSignal(y);
scatterPlot.Update(y);

System Details

• ScottPlot.WPF Version: 4.1.62
• Operating System: Windows 11
• Application Type: WPF
• .NET Version: NET Framework 4.8