Returning the mean of a continuous signal every x time

[Oxbow88]

Hello,

I have an input at 10 Hz, continuous datas from a sensor via the DAQ assistant

I want to make a loop where every second the mean of the 10 last values is returned

By example :

1st second : 1 2 1 2 2 1 2 1 1 2

2 is returned

2nd second : 1 2 1 2 3 2 3 3 3 3

3 is returned

etc

is it doable ? Any idea of an existing .vi ?

[johntrich1971]

Why do you put the tedious limitation of the DAQ assistant as a requirement? Use DAQmx and read 10 values every iteration of the loop. Average these 10 values. Perhaps there is a way with DAQ assistant, but I don't use DAQ assistant so I'm not sure.

[Oxbow88]

To be clear : I don't want to do that IN the DAQ but working on the output

[crossrulz]

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@Oxbow88 wrote:

To be clear : I don't want to do that IN the DAQ but working on the output

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Yes.  The suggestion was to have the DAQ assistant give you the X samples in a single call and then you just average the data you were given.

[FireFist-Redhawk]

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@Oxbow88 wrote:

By example :

1st second : 1 2 1 2 2 1 2 1 1 2

2 is returned

2nd second : 1 2 1 2 3 2 3 3 3 3

3 is returned

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Just to be clear, in your example you are returning the MODE of the data set (value that occurs the most), not the MEAN (average of the values). So what exactly is it that you want returned?

[Oxbow88]

It was the mean but rounded to the nearest integer

So, any idea of a code or function to do that ?
Like I said I cannot use the DAQ assistant for some reasons

that would be awesome

[GerdW]

Hi Oxbow,

read 10 samples using DAQmx functions, then apply the Mean function on those samples…

What have you tried? Where did you fail?

Mind to attach your VI?

[johntrich1971]

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@Oxbow88 wrote:

It was the mean but rounded to the nearest integer

So, any idea of a code or function to do that ?
Like I said I cannot use the DAQ assistant for some reasons

that would be awesome

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I took a look at the DAQ Assistant and you should be able to do it with that (though I highly advise converting to DAQmx functions and getting away from that dreadful dynamic data wire). Post some code and you're likely to get more help on showing you where you've gone wrong.

[RavensFan]

This is a duplicate of this thread!

https://forums.ni.com/t5/LabVIEW/How-to-slow-a-continuous-DAQ-acquiered-signal/m-p/4067031