LabVIEW
manipulating certain elements in an array
Well, for this you don't need to manipulate the arrays, they remain the same during the processing of this task. You just need to use index array to get the desired elements. Now you could build these elements into a new array and use mean from the statistics palette. You could also use "add array elements" and divide by the array size.
How complicated are your requirements? Do you always want to share the index between all input arrays or can the indices be random (for example: average the fist element of array A, 5th element of array B, ad last element of array C).
You definitely don't need to initialize any arrays, because it seems you already start out with arrays. Maybe I don't understand what you mean by "initialize"?
Are all arrays of the same lenght? Do you want to process the entire arrays calculating the mean of each slice? In this case an autoindexing FOR loop would fit the bill.
Why don't you attach a simple program containing your arrays and tell us what kind of output you expect. You should be able to do all that with code the size of a postage stamp. 🙂
Well, we have missing VIs and very strange constructs. For example you are trying to take the mean of an array of filenames instead of the containing data. You also spin the while loop, but only retain the last filename. Maybe you want to autoindex at the loop boundary. I would recommend to do a few general LabVIEW tutorials.
Here's a quick draft how things could be done.
I have no idea how your data is organized inside the file, so you certainly need to modify the attached draft so your data is read correctly. Still, maybe it can give you some ideas.
The basics would remain the same, however you would need to read the full 2D array, then slice out the second row (using index array with one index disconnected) ) before processing as shown.
@econwendy wrote:
Am I right in thinking that if I would like to calcualte the means of the second row, I would do the same thing as the code above?
It all depends how your data is organized. In my example, you would use the "all rows" output of "read from spreadsheet file", giving you a 2D array. Now you can slice out the desired row using "index array" as described earlier.
Do you have an example datafile? "read from measurement file" will probably work too if you configure it right.
