convert 1D array to four individual numbers

[gordon mcleod]

I am using a simple AI read to measure the output of 4 LVDT's. I wish to break up this data (which is in a 4-element 1D array) into four numeric single point precision elements. Any suggestions?? I have tried using the index array function but this still produces an array at the output.

[waldemar.hersacher]

Hi gordon,

I think you use "AI Sample Channels.vi" which will give an 1D-array. If I connect "Index Array" it works. If you use "AI Read.vi" it will give you a 2D-array, so "Index Array" will give a 1D-array.

Mayby you have done something else wrong it is a good idea to attach the VI to a reply.

Waldemar

[Dennis_Knutson]

Your data from the AI read is not a 1D array with 4 elements. It is a 2D array with 4 1D arrays representing a single channel scan with multiple measurements. To get a single numeric representation. Index the array as you've done and then process each channel. Do soemthing like take the mean of each channel or any other post processing you feel appropriate.

[Mikael_Garcia]

I should also add that Arrays in LabVIEW can be confusing at first. If you look at the wire thickness you can tell its dimension. Take a look at this picture and you will see (DBL) wire types in LabVIEW. /Mikael