Evaluating an arbitrary length boolean logic expression

[Marshall GaTech]

Is it possible to have labview evaluate a boolean expression of arbitrary length and complexity, which would be input by the user. Storage format of the expression isn't necessarily important. Use of the attached vi might provide some help for evaluating the expressions.

[Amaury]

There are a couple of ways to go about this. You may want to look into the Mathmatics&#0187Formula&#0187Advanced Formula Parsing pallet for some useful VIs.

One way to do it would be to parse a string for expresions and perform the oppertation specified. Attached is a first step in doing this. Note that it returns an array of results...the code for anding and oring still needs to be added.

Hope this helps,
Amaury Rolin
NI Applications Engineer

[Marshall GaTech]

Could someone please save the vis in this library as version 6i for me? Much Thanks.

[Amaury]

This any better?

[Marshall GaTech]

Yes, thanks.