# LabVIEW

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## Arithmetic mean

Hello!

Does anyone have the OpenG Arithmetic Mean VI (at least the one for 2D array). I have installed the OpenG Numeric package, but cant find it there.

Or maybe even better, does anyone have a VI or a good solution for calculating the mean of columns in a 2D array?

Greetings

Kristoffer

Message 1 of 20
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## Re: Arithmetic mean

does this Help?

"Should be" isn't "Is" -Jay
Message 2 of 20
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## Re: Arithmetic mean

Thank you!:)

Just a further question: Is there any possibility for also using a time column when calculating the mean? Such that the code take into account the length of the samples as well (given that the sample time is not a fixed value).

Greetings

Kristoffer

Message 3 of 20
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## Re: Arithmetic mean

There are no native functions that I am aware of (not saying it does not exist).

How are your time samples taken?

ie:  seconds since last sample..?

timestamp?

For instance, if it is a timestamp, and they are in an array, you can take the difference from the previous element, and then calculate the mean.

Message 4 of 20
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## Re: Arithmetic mean

As it is now it is an array of type string, but I am trying to convert the type of the whole array into timestamp. I was then thinking of doing just as you say, taking the difference from the previous element. Do you have any good examples of a loop where this is done?:)

Greetings

Kristoffer

Message 5 of 20
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## Re: Arithmetic mean

This will do if the timestamp string is local specific

If your timestamp string is in a different format

Here is a link to the Formats you would use

E.G. %<%Y/%M/%d %I:%M:%S %p>T  would create a timestamp from "2012/04/10 2:04:51 PM"

"Should be" isn't "Is" -Jay
Message 6 of 20
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## Re: Arithmetic mean

Broken Link-  Don't know what happened

Here

"Should be" isn't "Is" -Jay
Message 7 of 20
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## Re: Arithmetic mean

Hello!

I have transformed the 2D array from string to timestamp! I was more thinking of a good structure for taking the difference from the previous element when the array is of type timestamp.

Greetings

Kristoffer

Message 8 of 20
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## Re: Arithmetic mean

nothing simpler

"Should be" isn't "Is" -Jay
Message 9 of 20
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## Re: Arithmetic mean

Thanks again. But, that will be for a 1D array if I'm not wrong? My array is a 2D, so i guess i'll need to either add a loop for iterating both columns and rows or something?

Greetings

Kristoffer

Message 10 of 20
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