How do I programmatically change waveform attributes?

[jmcglump]

Hello,

I am using the Formula VI to calculate a power level based upon measured values of voltage and current, both of which are dynamic data. The result has the name "(Formula Result)". I'd like to be able to change the name attribute to "Power", but I can't see how to do so.

Thanks,

Jonathan

[RavensFan · Accepted solution]

Here is one idea. Create a subVI that all it does is take the dynamic data wire in and passes it right back out.  In the subVI change the name of the indicator that the output connector is associated with to "Power".

Now when the signal passes through, the wire will be known as the name of the indicator in the subVI rather than the name "Result".

There may be a better way of doing this, but Dynamic Datatypes are difficult to really know what is going on behind the scenes, so I don't work with them much.

[Claire_Reid]

Jonathan,

Do you just want to change the label of the result? You can just double-click the label and change it to whatever you want it to be.

[jmcglump]

Claire,

I needed to change the attribute itself since I am writing the result to a file, and I want it to have the name "Power" there as opposed to "(Formula Result)"

Ravens Fan,

I was able to do as you suggsted using a sub-VI that reads in the dynamic data, converts it to a waveform array, then uses the Write Waveform Attribute function to change the channel name. Finally, I convert the waveform array back to dynamic data.

Thanks to you both!

Jonathan