To find the zero of cosine between 1 and 2 Calculate by finding the zero of the sine function near 3.Įxample 2.
NaN or Inf function value was encountered during search for an interval containing a sign change.Ĭomplex function value was encountered during search for an interval containing a sign change.įzero might have converged to a singular point. Returns a value exitflag that describes the exit condition of fzero:Īlgorithm was terminated by the output function.
Returns the value of the objective function fun at the solution x. Specify a user-defined function that the optimization function calls at each iteration. 'on' displays a warning when the objective function returns a value that is complex or NaN. 'off' displays no output 'iter' displays output at each iteration 'final' displays just the final output 'notify' (default) displays output only if the function does not converge.Ĭheck whether objective function values are valid. fzero uses these options structure fields: You can define these parameters using the optimset function. Minimizes with the optimization parameters specified in the structure options. Calling fzero with such an interval guarantees fzero will return a value near a point where fun changes sign. If x0 is a vector of length two, fzero assumes x0 is an interval where the sign of fun(x0(1)) differs from the sign of fun(x0(2)).
Parameterizing Functions Called by Function Functions, in the MATLAB mathematics documentation, explains how to provide additional parameters to the function fun, if necessary. In this case, the search terminates when the search interval is expanded until an Inf, NaN, or complex value is found. The value x returned by fzero is near a point where fun changes sign, or NaN if the search fails. See Function Handles in the MATLAB Programming documentation for more information. Tries to find a zero of fun near x0, if x0 is a scalar. Fzero (MATLAB Functions) MATLAB Function Reference