continuous, overwriting, waveform graph (.net)

[Bertie]

How do I set up my waveform graph so that when I have filled a screen with plot data, the next data I add (at the beginning of the screen) - overwrites the present plot data. What I mean is - the graph stays visible as the new data is added.

[It makes the graph feel smoother]

I have tried:

double [] d; // data

double di; // increment resolution

plotY(d,0,di);

plotYAppend(d,di);

...

screen full

then

plotY(d,0,di); etc ...

Sadly instead of simply overwriting the first (d.Length) plots in the graph - this removes the whole graph from the screen and starts the grpah drawing afresh

Can anybody help ...?

Regards,

B.

[Bertie]

I guess what I am looking for here is something that will emulate the ActiveX graph "CNiGraph" and its method:

void PlotY(const CNiMatrix& y, double xFirst, double xInc, bool plotPerRow);

I am sure that this will simply overwrite the data in the history (from the xFirst point), rather than zero it all.

Can this be emulated in the .NET waveform graph control?

Thanks ...

[Elton Wells]

The WaveformGraph equivalent to the CNiGraph::PlotY overload that you mentioned is:

PlotYMultiple(double[,] yData, DataOrientation orientation, double start, double increment);

Please try this method and see if it accomplishes what you're looking for.

- Elton