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liuxbin xbin


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28 Dec 2008 Muller Find a zero crossing of a real or complex function using Muller's method Author: Daniel Cortes

27 Dec 2008 Adaptive Robust Numerical Differentiation Numerical derivative of an analytically supplied function, also gradient, Jacobian & Hessian Author: John D'Errico

When I use this function to get the derivative at the complex numbers,problem appears.For example:
derivest(@(z) exp(z),1+i)
ans =
1.46869393991590 - 2.28735528717885i
However,the derivative of exp(z) at z(complex numbers) should be exp(z)
ans =
1.46869393991589 + 2.28735528717884i
which is the conjucate of the above.

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