What Is Optimization Toolbox?

fminsearchPurposeEquationFind minimum of unconstrained multivariable function usingderivative-free methodFinds the minimum of a problem specified bywhere x is a vector and f(x) is a function that returns a scalar.SyntaxDescriptionx = fminsearch(fun,x0)x = fminsearch(fun,x0,options)[x,fval] = fminsearch(...)[x,fval,exitflag] = fminsearch(...)[x,fval,exitflag,output] = fminsearch(...)fminsearch attempts to find a minimum of a scalar function of severalvariables, starting at an initial estimate. This is generally referred to asunconstrained nonlinear optimization.x = fminsearch(fun,x0) starts at the point x0 and attempts to finda local minimum x of the function described in fun. fun is a functionhandle for either an M-file function or an anonymous function. x0 canbe a scalar, vector, or matrix.x = fminsearch(fun,x0,options) minimizes with the optimizationoptions specified in the structure options. Useoptimset to set theseoptions.[x,fval] = fminsearch(...) returns in fval the value of theobjective function fun at the solution x.[x,fval,exitflag] = fminsearch(...) returns a value exitflagthat describes the exit condition of fminsearch.[x,fval,exitflag,output] = fminsearch(...) returns a structureoutput that contains information about the optimization.“Avoiding Global Variables via Anonymous and Nested Functions” onpage 2-20 explains how to parameterize the objective function fun, ifnecessary.8-68