how to make a double null?

[mikeporter]

I see two arrays in your code, the output of the Array local and one of the items in the cluster is an array. The delete element function will work on any kind of array, even an array of clusters.

Mike...

[unknown00]

i am already aware of those 2 arrays. the array inside the cluster is successfully cleared, but it keeps saying the array local is a cluster of 3 items and not an array so i can't wire it to delete function

[mikeporter]

Ok, I think I see what you mean. You want to delete an element from the contents of the Array local where the boolean value in the cluster is false, is that correct?

Mike...

[unknown00]

correct if boolean is false then i want the cluster array and cluster double to be deleted (not set to 0 or anything). i got the cluster array to work but not double

[altenbach]

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@unknown00 wrote:
i am already aware of those 2 arrays. the array inside the cluster is successfully cleared, but it keeps saying the array local is a cluster of 3 items and not an array so i can't wire it to delete function

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I must admit that it is really difficult to understand what you actually want.

You have an array of clusters. Each array element is a cluster of with three items:

1. A 1D array of strings
2. A SGL numeric
3. A boolean

It seems that if the boolean is FALSE, you want to do something special to the array element, it is just not clear what! Do you want to remove the entire element so you end up with a shorter array of clusters, retaining only the elements where the boolean is TRUE? Do you want the SGL to have a special value? What do you actually want?

[unknown00]

Do you want to remove the entire element so you end up with a shorter array of clusters, retaining only the elements where the boolean is TRUE?

yes

read my post above yours too

[altenbach]

A numeric (e.g. your SGL)  always has a value, it cannot be empty. You also cannot remove that element from the cluster, because all array elements must have the same cluster.

Of course an array can have zero lenght, so one possibility would be to replace the SGL with an array of SGLs in the cluster. If the value is valid, you would generate an array with a single element. If the value is invalid, you would use a SGL array of zero lenght in the cluster.

Still, I suspect that you are approaching all this way too complicated. What do you actually need to do?

[unknown00]

delete cluster array and cluster double if false. the middle picture is what it is currently doing, the bottom picture is what i want it to do. boolean really doesn't matter what it is but cluster array and cluster double must be deleted

[altenbach]

What is your LabVIEW version?

Here's a quick draft in LabVIEW 8.0. See if it helps.

[unknown00]

thanks altenbach it seems to work fine so far. what was wrong with my method? is it not possible to delete the cluster double? just curious