create 2D array

[crossrulz]

FOR loop to autoindex on the array of clusters.  Unbundle the array in the cluster and use Build Array to add a -1 to the end.  While adding on the -1, add the array to the building array.

[altenbach]

Now you get a -1 as the very last element, not exactly the same as the original input, but probably close enough. 😄

[crossrulz]

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@altenbach wrote:

Now you get a -1 as the very last element, not exactly the same as the original input, but probably close enough. 😄

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That's your mistake.  The OP had a -1 at the end of the original array.

[altenbach]

You're right, but I was talking about the actual snippet. If there is a guaranteed -1 as last element, my code can be further simplified, i think.... (we don't need the code after the loop, for example)

[altenbach · Accepted solution]

If the last element is always -1, we can do the following (also assuming we have LabVIEW 2012 and concatenating output tunnels ;))

[sonotk]

Thanks all for the code and explanation.