I have a program which logs an arbitrary amount of separate LabVIEW values to a CSV. I solved this by using variant data types and parsing their XML representation. Now, the header row of the CSV gets built by concatenating the label of the value, two colons, and the data type. For example:
timestamp::DBL,voltage::U32
I feed the data into my subVI by clustering 1 to n different elements and then making a variant out of the cluster.
The issue arises when someone connects a wire to the cluster which comes out of a LabVIEW operator, for example the Subtract node. The resulting wire doesn't have a label and as far as I can see, it's impossible to give it one. So one solution would be to create an indicator, hide it on the front panel, and renaming that. Then you can create a local variable which has that name and the label gets read correctly. But I want to do this without creating a bunch of indicators.
I have tried to take the wire without a label and feeding it into Flatten to XML and then modifying the Name tag. This works, however when you then unflatten that XML string, you have to specify a type. And the <Name> part gets taken from that constant's label instead of what you just set in the XML string itself. How can I do this? Once I know how to set the label, I wouldn't have a problem with making a polymorphic VI to catch all data types, it's just setting the label itself I have issues with.
