Waveform Chart - Plot every n seconds

[labview_user123]

Hi, I'm relatively new to labview, and I have a fairly noob question... But I can't find the answer anywhere in the forums.

Put simply, I am using the waveform chart and want to plot my data every n seconds. Ideally I'd give the user a control to choose every 5 seconds, every 10 seconds, or every minute (depending on how long they decide to leave the program running for).

I found another thread with a link to this VI: (Absolute Time Chart-8.0.vi) although I now cannot find the original thread.

This VI is great for n samples per second. But I need the opposite of that (sample per n seconds).

I am using absolute time X plot and autoscaling.

Any thoughts / ideas on how to approach this would be much appreciated.

Thanks

[GerdW]

Hi 123,

This VI is great for n samples per second. But I need the opposite of that (sample per n seconds).

This VI allows you to input a fractional number: what will happen when you input "0.2" into the "Sample per Second" control?

Or to put it in other words: when you need the inverse of "Samples per second" you might use the inverse function found in the numerics palette. Simple math…

Keep in mind: this VI is a very basic example and not at all "great" to work with very low sample rates…

[Ben]

If you use a Wavefrom data type, the chart will plot the data on the X-axis according to the time stamp in the waveform.

Ben

[crossrulz]

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@Ben wrote:

If you use a Wavefrom data type, the chart will plot the data on the X-axis according to the time stamp in the waveform.

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Shameless plug to expand on this thought: Sporatic Waveform Chart

[Ben]

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@crossrulz wrote:

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@Ben wrote:

If you use a Wavefrom data type, the chart will plot the data on the X-axis according to the time stamp in the waveform.

---

Shameless plug to expand on this thought: Sporatic Waveform Chart

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Thank you for including that link Tim!

I went looking for a tag but came up empty. I added some more tags so maybe I will find it the next time I want to plug your nugget.

Ben