Strip Chart Demo

Describe the bug It seems the plot.Clear() does not remove a previously plotted PlotSignal

To Reproduce (1) Use plt.PlotSignal to plot a signal. (2) on the same form, use plt.Clear() to clear all Plottables. (3) add plot.Scatter (4) render the form (5) plot seems to switch between the Signal and Scatter plots.

The code below shows how the signal can be removed. However, I thought .Clear() should have done that. .Clear(Of did not seem to remove the signal either.

       With Me._ScottPlot.plt
            .Clear()
            Me._Signal = .PlotSignal(Me.OrdinateValues, Me.SamplingRate, markerSize:=0)
            .Title("'Sampled' Sine Wave")
            .YLabel("wave")
            .XLabel("Seconds")
            .Grid(Me._GridCheckBox.Checked)
            .AxisAuto(0)
        End With

        With Me._ScottPlot.plt
            .Clear()
            If Me.Signal IsNot Nothing Then .Remove(Signal)
            .PlotScatter(Me.AbscissaValues, Me.OrdinateValues)
            .PlotScatter(Me.AbscissaValues, Me.OrdinateCosineValues)
            .Title("Sine Wave Phase fixed size")
            .YLabel("signals")
            .XLabel("phase")
            .AxisAuto(0)
        End With

Screenshots If applicable, add screenshots to help explain your problem

[StendProg]

It may well be that a @AteCoder does not want to make his project accessible to absolutely everyone. Just mail directly to @swharden or/and me ([e-mail]) if i guess right.

[swharden]

Instead of making a separate strip chart demo, I just updated the WinForms “live data” demo to show an ECG. There is an option to switch between “roll” and “scroll” behavior. I’ll do the same for the WPF demo.

Note that there are two timers: one for updating the simulated data, and a separate timer for rendering. This way slowness of one process will not affect the other 👍

https://github.com/swharden/ScottPlot/blob/096062f5dfde8fd5f1e2eb2e15e0e7ce9b17a54b/src/ScottPlot.Demo.WinForms/WinFormsDemos/LiveDataUpdate.cs#L14-L91