05-06.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

% fit sine between 0 and 2*pi using 3 order polyn0mial
x = 0:pi/10:2*pi;
y = sin(x);
p = polyfit(x,y,3);
plot(x,y,'r*');
hold on
f = poly2sym(p);
ezplot(f,[0,2*pi]);

>> p