Is the command ''fzero'' based on Newton Raphson Method?
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I would like to know whether the function fzero is based on Newton-Raphson method, if so then I don't have to write extra code for the NR algorithm.
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Mischa Kim
2014-3-24
编辑：Mischa Kim
2014-3-24
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Karthik, the short answer is no. fzero is based on a combination of the bisection, secant, and inverse quadratic interpolation methods. See the documentation (at bottom of page) for more detail.
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John D'Errico
2014-3-24
I'd need to look at the code, but in general these types of codes are set up so that when the function is well behaved (sufficiently smooth), they will use a higher order method that would presume differentiability. If that fails however, they back off and revert to a lower order scheme (like bisection) that will be more robust to problems.
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