Calculate the average value of 10000 samples stored in a file. LVM with LabView

Hello, I'm using a NI 6034 to acquire through _ LabView a signal in volts from a pressure transducer, these data then save them to a file. Lvm using the "write to a file" (at least I think you call it or something like that). I would have 2 questions:
1) you can always using the virtual instruments to implement a block I calculate directly the average of these 10 thousand values without having to go to the star on excel every time?
2) is it possible to somehow remove the header that LabView a creates by default in the file. LVM when you save?
I hope someone will give me an answer because I'm really losing a lot of precious time to pass each time data from lvm file to the excel.
Thank you in advance for your advice.
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Marco86,
1. You should be able to read the data directly from the .lvm file in LV. Use the Express VI Read from Measurement File. You can wire the Signals output to the X input of the Mean.vi from the Mathematics >> Probability & Statistics palette. LV will automatically insert a conversion from the Dynamic Data Type output of the Read to the 1D Array of Doubles that Mean needs.
2. I rarely use the Write to Measurement FIle Express VI so I am not sure whether you can completely suppress the header. If you use the Write to Spreadsheet File.vi you get a tab delimited text file containing only your data converted to text and delimiters. You can create you own headers by writing a string array to the file before writing the numeric data. Of course you can have complete control over everything in the file by using the low level file functions and data manipulation and string conversion functions.
Lynn

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Calculate the average value

the data I measured changed rapidly, so i want get the average value of the data
Do not tell me to use mean.vi , i have already know that.
and i got an idea which is add the data into an array every time, then sum of all the data value and take the result divide by the number of elements
but i dont know how to achieve that, anyone can build a simple vi to show me ? thank you
i have attached my vi which is using mean.vi to calc the average value, you can delete it and using in your way , thank you !
Solved!
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Attachments:
EN-new.vi ‏274 KB

Hi I got a similar issue for averaging. I used the mean.vi from the math function but the average is rolling when i run it. I am trying to calculate the average for the data i read to the RT FIFO (which is around 40000 lines).I got the writing part working, however, when i am reading the data, I couldn't get it working. I thought i read the data as a 1-D array, and then pass it to the Mean.vi and then got the result. But seems like the mean is only showing the last data in the array.
Can someone help me with this??
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FPGA-vi.png ‏242 KB
RT-vi.png ‏182 KB
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How do you find the average value of all the data between two points on a single channel

I am tring to calculate the average value of all the data points on a single plot between two seperate points
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Solved!
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Attachments:
plot.jpg ‏173 KB

Hey smoothdurban,
I've seen Brad's code, and trust me, it's worth the effort to let him help you get it up and running - it's definitely the most ideal way to solve this problem. However, as Brad said, there are multiple ways to tackle this - both interactive and programmatic - so in the meantime, I'll take a second to detail one of the interactive and sure-fire ways to find the average of data between two points on a single channel.
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How do i calculate the average of runs that have variable number of samples?

Hi
I am trying to calculate the average trajectory from lets say 4 runs, with varying sample size.
That is, if the the 4 runs have 78,74,73,55 samples respectively, How do I calculate the average of (78+74+73+55)/4 , (78+74+73)/3 and (78+74)/2 and 78/1 ?
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I'm not sure you gave a sufficient information. Assuming that you just want to calculate a linear average of the data collected in consecutive runs, you have two simple methods :
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Attachments:
Averages.vi ‏40 KB

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Hi,
I have a problem. I'm reading data continuously from analog input. I want calculate average value when I press button START. Average value should be calculated from samples which are defined by 'Number of samples' and 'millisecond multiple'. When all samples are read, average vale should show.
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Attachments:
Average.vi ‏35 KB

For that you need to store the previous value for averaging... i have attached a VI regarding that ( sorry no time to cleanup ).. You can use the logic to calculate the average of the samples (Still am not clear about you requirement).
The best solution is the one you find it by yourself
Attachments:
Average_anand.vi ‏26 KB

How to calculate the average inventory in ABAP

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Hi Arivazhagan,
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I have a column of fields in my PDF that I am trying to calculate the average for.
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Calculate the average value of 10000 samples stored in a file. LVM with LabView

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