LabVIEW
How to mean 2D continuous data?
Solved!
Your data are stored in a 2-D array, as you have continuous samples of multiple channels. For example, let's say you are recording from 6 channels at 10 Hz. Then every tenth of a second, another six points will be generated (one per channel) and written to your output file.
Let's say you record for 10 seconds, hence take 100 samples. Your data file will have 100 "groups" of 6 samples, one per channel for each time point. If you read this into an array, you'll have a 2-D 100 by 6 array. If you "feed" this array into a LabVIEW For loop, it will "pick out" each of the 100 time samples, presenting you with a 1-D array representing the 6 channels that you took at some time. While you could average over the six channels, what you really want to do is to average over the 100 time points for each of the 6 channels.
For the PtByPt methods to work, you need to feed each channel, one sample at a time, into its own averager. If you know, in advance, the number of channels in your sample, you can simply create one averager per channel on your Block Diagram. [This is a little clumsy, but will certainly work -- there are probably "elegant" ways to do this at Run Time for an arbitrary number of channels, but that's Another Topic]. Here's a VI that would work for a known data set having 6 channels.
I hope this answers your question.
I interesting in your answer Bob,
I'm sorry for asking a ridiculous question (because I'm newbie in LabView 
), But what is the name of the component after array to cluster one??
By the way:
<sarcasm>
What is the "reverse" function to BuildArray? Yes, it's Array2Cluster followed by UnbundleCluster!
</sarcasm>
What about IndexArray?
