Unconstrained optimization using Powell: S=test(x) - File Exchange

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S=test(x) Edgar & Himmelblau, 1988
[stepsize,xo,Ot,nS]=aurea(S,x... Performs line search procedure for unconstrained optimization
[stepsize,xo,Ot,nS]=coggins(S... Performs line search procedure for unconstrained optimization
[x1,x2,nS]=bracket(S,x0,d,pro... Bracket the minimum (or maximum) of the objective function
[xo,Ot,nS]=powell(S,x0,ip,met... Unconstrained optimization using Powell.
powell_run.m
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from Unconstrained optimization using Powell by Giovani Tonel
Unconstrained optimization using Powell

S=test(x)
function S=test(x) % Edgar & Himmelblau, 1988 % x0 = [1, 2]' % xo = [0, 0]' % S(xo) = 0 S=4x(1).^2-2.x(1).*x(2)+x(2).^2;