loop array one by one

[H7N]

Hi All,

How can I change this VI to have the output array updated on each loop iteration instead of waiting for the program to exit the loop and then update all?

Thanks

[Gregory]

I cannot view it with LabVIEW 2014, but my guess is that your indicator is outside your loop, and it has to be inside to update every iteration. If you are using auto indexing, this means switching over to a shift register along with "replace array subset/element" (assuming you initialize your array). 

If you post a snippet I can get a better view,

Thanks

[James.M]

Same here as greg. Need 2014 or older and it probably is a dataflow issue.

LabVIEW programming is based entirely on dataflow and parallelism. This is incredibly powerful and has lead to its success over the years (coupled with the graphical programming), but is usually one of the first things that new developers stumble over. The Highlight Execution feature is a great way to watch how your application utilizes dataflow.

[RavensFan · Accepted solution]

You need to use a shift register for the array and use build array inside the loop.  Move the indicator terminal inside the loop.

[crossrulz]

And to simplify a little more by using a FOR loop...

[JÞB]

OK,

Somebody backsave that to 2014.  Why aren't we using a for loop with a conditional output tunnel rather than a SR?  Tim's code looks like "build Array from null until stop or array index".  What am I missing this close to midnight?

Spoiler

I must need sleep!  Tim and Bill don't miss that often

[RavensFan]

The OP said they want to see the array update while the loop was still iterating.

Tim missed because he put the terminal outside the loop.

I'm assuming the original VI was all just academic because it only iterates 5 times and would happen near instantly.  And the while loop doesn't make much sense for a defined size array as Tim pointed out.  But what the OP posted was just a simple example to demonstrate where they were at the moment.

Actually, what I showed may not match the requirements.  I showed the array being built one by one.  If it is a case of seeing the entire original array to start and it being updated each iteration with the +1,  I probably should have used replace array subset.

EDIT:  I see that is what GregoryJ suggested, just that he hadn't posted yet by the time I started coding up the example and posted my message.

[JÞB]

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@RavensFan wrote:

The OP said they want to see the array update while the loop was still iterating.

EDIT:  I see that is what GregoryJ suggested, just that he hadn't posted yet by the time I started coding up the example and posted my message.

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Makes more sense now.

H7N, Could you be a bit more specific about what you need?  (And that 2014 backsave would help a lot!)

[crossrulz]

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@RavensFan wrote:

Tim missed because he put the terminal outside the loop.

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Looks like I needed the sleep as well...  Time to start a new day.

[H7N]

Thank you all for your replies.

RavensFan's solution was spot-on exactly what I wanted.

I'm going to try the one with the for loop as well but I think apart from the O/P array that should be inside, it works the same.

For those who asked, here's the VI saved as V14 compatible.