VS Arduino - Plot window only shows limited datapoints

Jun 16^th, 2025 at 6:26am (UTC)

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VS Arduino › Visual Micro › Installation & Troubleshooting › Plot window only shows limited datapoints

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Plot window only shows limited datapoints (Read 1223 times)

bc547 Newbies Offline Posts: 9 Joined: Aug 27^th, 2016	Plot window only shows limited datapoints Sep 3^rd, 2016 at 2:33pm	Print Post
	When plotting some temperature data, the plot window only shows about 10 minutes of data. Older data seems to be deleted and removed from the plot. I made a small screencapture to illustrate the behaviour: https://www.youtube.com/watch?v=Ml6HQJJGDfI (The effect is best seen at fast forward speed) The same behaviour happens when I set the X sweep range to e.g. 2 hours: only about 10 minutes of data is plotted. Used plot settings: - Datapoints arrive approx every 220ms (breakpoint action: {@Plot.Karmonitor.Inside.Diamond data.temp1}{@Plot.Karmonitor.Outside.Diamond data.temp2}) - X sweep range is 20 minutes - Time Format: hh:mm:ss - No trigger function Software versions: - Visual Micro 1609.2.0 - Visual Studio Community 2015 14.25425.01 Update 3 This seems to be a small bug?


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Heinz Kessler Full Member Offline Posts: 217 Location: Freiburg, Germany Joined: May 25^th, 2012	Re: Plot window only shows limited datapoints Reply #1 - Sep 3^rd, 2016 at 3:28pm	Print Post
	Hi, there is a fixed maximum number of data points of 6000 per chart. With this data rate and sweep time, the chart runs out of data points and discards the old ones. You can solve this by reducing the data rate, like so: int counter; if( ++counter >= 10 ) { // put your @plot breakpoint here counter = 0; } With your sweep time, you won't experience any quality degradation by reducing the data rate, because currently, many data points will be drawn to the same screen pixel. Currently, 6000 is a fixed limit that takes older/low performance PCs into account, in a future version of Visual Micro, we will make this limit selectable by the user. Regards, Heinz Kessler - Visual Micro


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bc547 Newbies Offline Posts: 9 Joined: Aug 27^th, 2016	Re: Plot window only shows limited datapoints Reply #2 - Sep 3^rd, 2016 at 3:54pm	Print Post
	Thanks for the clarification!


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