Evaluate String/Numeric Expression

[antony.g]

Overview

 An expression evaluator which has been written in LabVIEW.

Description

The included VIs allow an expression to be evaluated, including numeric expressions such as "5+6", plus string expressions. Brackets can be nested to any level, and a number of functions can also be used. Numeric operators include +-*/, and strings can be concatenated using "&".

The main expression is evaluated using the "Eval - Main" VI. Expressions can contain variables which can be set/read using the "Eval - Variable" VI. New functions can easily be added by editing the case statement in "Eval - Main".

An example front end has been included, "Front Panel.vi", to allow experimentation by entering a number of expressions and displaying their output.

Hardware and Software Requirements

LabVIEW 2010 or later