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creating polynomial

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Hello all,

 

I am working on a VI, and am stuck. How can I create a second order polynomial in general Ax^2+Bx+C, being able to use A,B and C as controls on the front panel. Sorry this may seem simple to most, as I am a newbie. I have tried using Mathscript as the simplist way, but it is not plotting correctly.

 

Please help

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Mathscript is only simple for programmers more experienced with text-based languages than with LabVIEW.

 

For a quadratic I would probably just use the Add and Multiply primitives in the Numeric palette.  For higher order polynomials or if you have an array of irregularly spaced x values use the Polynomial Evaluation.vi from Mathematics >> Polynomial (of all places!).

 

Lynn

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I had looked through the polynomial functions in labview, but could not find much help with them. The problem with adding and multiplying is how can you set x as a constant to follow the graph? Maybe I am just over thinking this, or am missing something simple.

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Solution
Accepted by topic author jhatf008

Here is a quick and dirty example.

 

Lynn

 

Polynomial.png

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Maybe I should be a little more clear on what I want to accomplish, I want to create a second order polynomial (Ax^2+Bx+C). A,B,C and N, need to be controls on the front panel. Where N is the number of points I want it to plot of the interval of X_0 to X_N-1. Here is my block diagram so far, please offer your opinion on what to do next

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Thank You very much, I see my mistakes

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Have you figured how to enter X_0 and X_N-1?

 

Lynn

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