topic Re: 1D array into single values in LabVIEW

1D array into single values

Olli — Fri, 20 Apr 2007 09:11:49 GMT

Hi,
is there a kind of reverse "build array" function available? I'm looking for a function, which gives me all elements of a 1D array. At the moment I convert it into a cluster and then unbundle this. This works, but a direct access would be smarter.
Ciao
Olli

Re: 1D array into single values

TCPlomp — Fri, 20 Apr 2007 09:16:44 GMT

Yes,
there is, it's called 'Index Array'

Ton

Re: 1D array into single values

Olli — Fri, 20 Apr 2007 09:49:57 GMT

Hi TonP,
thanks for your replay! Yes I know the "index array" function. With this I would need n numbers of "index array" functions for n numbers of elements, but I'm looking for a single function which extracts all values from the 1D Array like the unbundle cluster function.
Ciao,
Olli

Re: 1D array into single values

tst — Sat, 15 Nov 2025 21:02:30 GMT

You can resize the Index Array function to output as many elements as you like.
In any case, the difference between a cluster and an array is that a cluster has a fixed number of named elements and the array has a variable number of elements, so you can't automatically know at design time how many elements you will have.

If you do know, you can use the array to cluster primitive and right click it to select the number of elements in the cluster.

To learn more about LabVIEW, I suggest you try searching this site and google for LabVIEW tutorials. Here, here, here, here and here are a few you can start with and here are some tutorial videos. You can also contact your local NI office and join one of their courses.
In addition, I suggest you read the LabVIEW style guide and the LabVIEW user manual (Help>>Search the LabVIEW Bookshelf).

Re: 1D array into single values

GerdW — Fri, 20 Apr 2007 10:15:00 GMT

Hi Olli,

you can resize the 'index array' to give you more than one output! Each output gets its own index input...

Re: 1D array into single values

Olli — Fri, 20 Apr 2007 13:33:45 GMT

Hi again
thank you all...yes I must now say that I did not know this "newer" feature that I can extend the index array function to output elements. That is exactly what I'm looking for! I thought resizing this function is only array dimension related but not array element related.
Ciao
Olli

Re: 1D array into single values

Dennis_Knutson — Fri, 20 Apr 2007 13:37:52 GMT

It's hardly new. I don't remember when this was first available. The oldest version I have installed is 6.1 and the feature is there.

Re: 1D array into single values

altenbach — Fri, 20 Apr 2007 16:15:15 GMT

@Olli wrote:

That is exactly what I'm looking for!

And don't forgret that if you want the elements in order, you don't even need to wire the indices. 🙂

Similarly, if you only wire the first index, it will be incremented automatically for the successive elements.

The image shows two possibilities, there are many others.

Message Edited by altenbach on 04-20-2007 09:16 AM

Re: 1D array into single values

Olli — Sun, 22 Apr 2007 19:23:24 GMT

Hi altenbach,
thanks for the info! I tried it already after the first hints 😉 I really should explore more and more the possibilities of often-used functions...and read the LV help more carefully before putting questions in the forum.
Again thank you all!
Olli

Re: 1D array into single values

aasu — Sat, 28 Oct 2017 12:13:21 GMT

Hello,

I have a similar but different problem. I want to get all the elements of a subarray one by one in each loop. I have 271 elements in the subarray. Is there any way I can do it? I attached the image of my VI for better visiualization.

Re: 1D array into single values

altenbach — Sat, 28 Oct 2017 17:33:10 GMT

If it is a different problem, you should start a new thread instead of adding to a 10 year old discussion about something else.

Why do you think you have to read the same file 271 times as fast as the computer allows. Are you expecting the file data to change? Reading the file once before the loop is sufficient! How many points are in the file?
You seem to be interested in the first two columns. Both are contained in the 2D array, so also tapping into the 1D array output seems redundant.
To just graph the data, you don't need the loop at all.
Can you explain your convoluted use of uninitialized and expanded shift registers? Makes no sense to me.
What is the purpose of the math you are doing? (subtraction, division).
If you want to build the graph slowly, adding one point at each iteration, you need to slow down the loop. Currently it executes in nanoseconds.

Suggestions

Attach your actual VI and a datafile. We cannot debug pictures.
Tell us exactly what you expect to happen when you run it.
I am sure all this can be done with 5% of the current code.