esmin3.m

% script esmin3

f=inline('abs(exp(-x)-sin(x))');
option=optimset('tolX', 1.0E-8);
[sol, val]=fminbnd(f, 0, 1, option)
x =linspace(0,5, 500);
plot(x,f(x));
axis([0,5,min(f(x)), max(f(x))]);
hold on
axis manual
plot(sol,val,'r+');
str = sprintf('minimum  x = %7.4f de valeur %7.4f',sol,val);
text(0.2, 0.5, str, 'fontsize', 14);
title('fonction |e^{-x}-sin x|', 'fontsize', 14);