Evaluate Equations Using Parse Formula Node.vi and Eval Parsed Formula Node.vi.

[Scott_G]

Overview

This example demonstrates how to parse a string of formulas and calculates the variable values.

Description

This example shows how to evaluate equations using Parse Formula Node.vi (Mathematics>>Scripts & Formulas>>Formula Parsing) and Eval Parsed Formula Node.vi (Mathematics>>Scripts & Formulas>>1D & 2D Evaluation).  This is similar to the Formula Node but with variables and formulas that can be entered on the front panel.

In this particular VI, the area of a circle when given the radius and value of Pi is calculated.  This example shows how to enter simple equations in a string control and how to setup the input variables, input values, and output variable as well.

Requirements

 Software

• LabVIEW Full Development System 2012 (or compatible)

 Hardware

• No hardware is necessary to use this example VI

Steps to Implement or Execute Code

1. Download and open the attached file
2. Run the program

Additional Information or References

**The code for this example has been edited to meet the new Community Example Style Guidelines. The edited copy is marked with the text ‘NIVerified’. Read here for more information about the new Example Guidelines and Community Platform.**

[jlguthri]

The 4th find/replace block needs to have the top bools wired.... otherwise, it don't count the number of formulas right, when you add additional ones...