topic Index Array always returns zero when reading from 3D Array in LabVIEW

Index Array always returns zero when reading from 3D Array

johnfr — Wed, 30 Sep 2009 20:54:47 GMT

I have 3D array diamension as a 9x2000x5 array. I have this array filled with data and when I attempt to read a single data point out of the array the Index Array function always reads zero. I have place a probe on the input 3D array and when I set the probe indexes to the same data point the probe shows the value stored in the array. I also have an indicator displaying the 3D array data and it shows data in all the locations. For example if I attempt to read location 0, 144,0 in the 3D array it alway returns zero. Yet I know the value in that element is 6.8616E-5. Every element I attempt to retreave from the array yields zero.

Has anyone seen the Index Array exhibit this kind of behavior?

Re: Index Array always returns zero when reading from 3D Array

smercurio_fc — Wed, 30 Sep 2009 22:45:08 GMT

No, and that's not likely to be the source of the problem. Without actually having a VI in hand, I'd guess the problem is with the indicator that displays the element you're retrieving. If I had to guess, you probably have the wrong representation for the indicator (like an integer instead of a float), or you have the digits of precision too low.

If you attach your VI we can provide a more definitive answer.

Re: Index Array always returns zero when reading from 3D Array

Harold_Timmis — Thu, 01 Oct 2009 00:47:54 GMT

here is an example of indexing from a 3D array:

Re: Index Array always returns zero when reading from 3D Array

johnfr — Thu, 01 Oct 2009 14:16:47 GMT

Issue resolved. As usual it was pilot error on my part. Had the row and column lines reversed.