fzero.m

matlab最优化工具箱

%FZERO Find zero of f(x)
%
%  x=fzero('f',x0,tol) returns x for which f(x)=0. If no such x is found, 
%  x=NaN. x0 serves as an initial guess.
%  tol is the tolerance for which a zero will be identified. 
%  Optional arguments may be provided to f by passing them to fzero, 
%  with an extra empty matrix before them.
%
%  Copyright (c) 1994-1999 by MathTools, Ltd.
%  Built-in function.