ex given.m

用有理多项式做Chebyshev逼近的一种直接方法的matlab程序

close all
clear
l=3;m=3;
e=[0.03230211978 0.9214903503 2.29709997 3.617072046 1.24719940 7.28646432 0.79344987];
x=[1.032829500 1.139308775 1.318965771 1.551541059 1.761543540 1.937280282];
t=[1:0.01:2];
r=r(t,e,x,l,m);
plot(t,f(t)-r)
title('error')
figure
plot(t,r,t,log(t))
legend('approximation','log(t)')