Complex Number Root Finder/Zero Finder

[Tochip]

Does anybody know of a Zero Finder or Root Finder that can handle complex numbers? I believe that all of the ones included in LabVIEW 7.1 are for Real numbers and do not include complex numbers. Any suggestions or ideas on implementing one would be helpful! thanks so much!

[GerdW]

Hello Tochip,

to find roots of complex numbers:
Recalling my math lectures some years ago I remember: convert a complex number into its polar form (r and theta), take the n-th root of r and divide theta by n gives you the "standard" root. To get the other roots you have to add 360°/n to theta/n. Please check this with your favorite math book 🙂

[DSPmchen]

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@Tochip wrote:
Does anybody know of a Zero Finder or Root Finder that can handle complex numbers? I believe that all of the ones included in LabVIEW 7.1 are for Real numbers and do not include complex numbers. Any suggestions or ideas on implementing one would be helpful! thanks so much!

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Hi, Tochip,

Labview has a root finder VI at least since 7.0, even earlier. It names "Complex Polynomial Root.vi" which finds the roots for complex coefficients polynomial. In LV 7.1, you will find the "Polynomial Roots.vi" is a polymorphic VI that can handle both real and complex coefficients polynomials.