fzero function for complex vector root
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I want to evaluate roots of a nonlinear function which generates vectors of complex number. is that possible using fzero function?
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Walter Roberson
2014-2-24
1 个投票
No, fzero() can only alter a single real-valued number and the fitness function must return a single real-valued result that crosses 0 (fzero is not suitable for functions that only touch zero such as sum(abs(Vectors)) )
If you are working with multiple values (including real and imaginary parts of a single variable) then you should be using a function from the Optimization Toolbox or the Global Optimization Toolbox. The functions that are provided in base MATLAB operate on a single real value and need a single real result.
1 个评论
Alan Weiss
2014-2-24
To expand on Walter's answer, you can use the fsolve function in Optimization Toolbox. All you have to do is ensure that the inputs and outputs are real vectors, instead of complex scalars. Use the real and imag functions to convert to real vectors.
Alan Weiss
MATLAB mathematical toolbox documentation
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2014-2-24
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