topic Re: quadratic in LabVIEW

quadratic

Husain111 — Fri, 07 Aug 2015 15:49:07 GMT

I am using Polynomial Roots VI to solve simple quadratic equation but alwas ge the wrong answer. Let us have simple proplem 2*X^2+2*X+0=0, the roots of thos are -1,0 but the VI gives different roots.

Re: quadratic

akovaski — Fri, 07 Aug 2015 16:16:19 GMT

Check your array, it is currently [0, 2, 2, 4]

Re: quadratic

Bob_Schor — Fri, 07 Aug 2015 16:26:08 GMT

Yes. You are asking the Root Finder to find the roots of a cubic (just because you can't "see" the fourth coefficient in your Constant Array doesn't mean it isn't there ...)

Re: quadratic

Husain111 — Fri, 07 Aug 2015 20:18:22 GMT

Well stoppted. It was a studipd mistake from my side.

Re: quadratic

billko — Mon, 10 Aug 2015 02:17:14 GMT

Don't beat yourself up over it. That's why it's always important to have a second set of eyes to look at the problem. 🙂