05-22.txt

《MATLAB R2007基础教程》 清华大学出版社,包含电子课件,实例原文件,习题答案,都是基于matlab实现

% the file to creat a function with parameters
function y = poly3_fun(x,a,b,c)
y = x^3+a*x^2+b*x+c;


% find the minimum of the function f(x)=x^3+a*x^2+b*x+c
function [x0,y] = funmin_para(a,b,c,x1,x2)
options = optimset('Display','off');
[x0,y] = fminbnd(@(x)poly3_fun(x,a,b,c),x1,x2,options);
% plot the function
end


>> [x,y]=funmin_para(-1000,10,0,600,800)