CVI PlotXY refresh

[Paul Braho]

I am reading a data file from another PC that is updated every four seconds.  I want to do a xy plot with four traces.  How do I refresh the data for plots 1 through 4?  Everything I try always generates new plots.

[LuisG]

Paul,

You cannot change the data used by a plot. The way you refresh a plot is to delete it and then re-plot using the new data. From a performance standpoint, it's no less efficient to do this then it would be to change the data of an existing plot.

Just be sure to pass VAL_DELAYED_DRAW as the last parameter of DeleteGraphPlot, in order to avoid double-drawing, which would cause flashing.

Luis