average of the last 1000 values

[kurabiye]

Hello all,

   I am taking continous measurement and I wanted to average the last 10000 readings and stop the loop if the stanard deviation is less then 0.2. I couldnt configure how to delete the earlier data than the last 10000 measurements. 

Thanks

[crossrulz]

Look in the Signal Processing->Point by Point->Probability and Statistics PtbyPt palette.  There is a mean and a standard deviation in there.  It will do it all for you.

[kurabiye]

Thanks but I am avare of that VI. My question is more like how can I delete the previous values from the array so I will always have 10000 readings ? 

[MKirk]

I'm afraid I may also be misinterpreting the question, but the image below shows 3 different methods for getting a select 10,000 datapoints from an array. If this doesn't help, please post your vi or a sample of the code in question.

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Matt Kirk

Inventor of ImageJVI

[johnsold]

If you open the block diagrams of the VIs suggested by crossrulz, you can see how NI does it.  The PtByPt VIs accumulate the specified number of points and then operate as a circular buffer, discarding points which are no longer needed.

Lynn

[kurabiye]

Yes, looks like I have misunderstood the response. All were very helpful, I appreciate that and I am using PtByPt VIs.