Unused outputs in formula node

[ToeCutter]

Hi,

To keep my code clean and avoid repeated calculations, I want to use some intermediate variables in my formula node code. To create these variables, the only way I know is to create an output variable from the node, which of course ends up unused. Is there any issue/inneficiency created by doing this?

Thanks

[mikeporter · Accepted solution]

Define a variable inside the formula node. Use C syntax

Mike...

[ToeCutter]

Well i never knew... Thanks Mike!

[mikeporter]

A lot of people don't realize it, but the formula node is really a mini C compiler.

Mike...

[ToeCutter]

That's useful to know.

Does it support extended precision? I can't seem to define a float128 which I assume would be the equivalent of EXT. Not sure why it does not support the same data type names as external variable, e.g. I32, DBL etc.

[GerdW]

Hi ToeCutter,

thanks for the LabVIEW help, so we know which datatypes are supported!

In your case: float, float32, float64…

Not sure why it does not support the same data type names

Because it's a (subset of a) C compiler. Most C idioms use different datatype names than LabVIEW…

[ToeCutter]

Indeed Gerd... RTFM... sometimes I don't take my own advice.

Lack of an EXT equivalent is a bit of a pain, and also in the interests of simplicity, don't see why 'DBL','EXT' etc types cannot be #defined behind the scenes.