How to read text in variant input terminal on control pane

[Piotr.Zawistowski]

Hi all,
I've created a 3D array of double and I've sent it to sub vi to a variant terminal. How to read info that is displayed on the terminal? The message on the terminal that I want to read is:

'': 3D array of
'': double [64-bit real (~15 digit precision)]

[500x5x0]

I'd be grateful for any help!

Best regards,

Pete

[crossrulz]

You could just use the Variant To Data with a 3D Array wired to the data type to get your array back.  Granted, at that point you might as well not have used the variant.

[mikeporter]

You can't read that text that appears in the control directly, but you can reconstruct it. Why do you need the text?

Mike...

[ben64]

---

@Piotr.Zawistowski wrote:

Hi all,
I've created a 3D array of double and I've sent it to sub vi to a variant terminal. How to read info that is displayed on the terminal? The message on the terminal that I want to read is:

'': 3D array of
'': double [64-bit real (~15 digit precision)]

[500x5x0]

I'd be grateful for any help!

Best regards,

Pete

---

I don't know what you might expect from an array which have 0 column, it will never contain any value.

The VariantType.lvlib:GetArrayInfo.vi can also give you informations (number of dimensions, element data type).

To retrieve the original array use the Variant To Data function as specified by Crossrulz.

Ben64

[Piotr.Zawistowski]

Hi all,

thanks for replying. I just want to have generic terminal to which I can connect any type of data and, using this information from the terminal, change to proper type. I can easily get the information that this is a cluster but how about any information about dimensions and type of data...? Any clue?

[ben64]

As I said, have a look at the vis inside the VariantType.lvlib. There is a vi called GetClusterInfo.vi

You can find this library at the following location:

C:\Program Files (x86)\National Instruments\LabVIEW 2014\vi.lib\Utility\VariantDataType

Alternately you can download the "Hidden Gems in vi.lib" package from the JKI VI Package Manager.

Ben64

[mikeporter]

When you say "any", do you really mean ANY datatype. If the expected data types are somewhat constrained, a polymorphic VI might be an easier way to get where you're going.

Mike...

[Piotr.Zawistowski]

Maybe not any, but arrays, doubles, integers, strings, etc.. I want to create XML file later. 

[mikeporter]

Well you can flatten a variant directly to XML.

Mike...

[Piotr.Zawistowski]

But in the array case, I'd rather like to get dimensions and size of it, rather then log data to XML (for performance reasons). I thought it's easier if the information I need, is displayed on terminal...