quedingdianzhi.m

牛顿迭代法

% Runge现象
% n --- 等分区间数

a=-5; b=5;
for t=2:2:20
    h=(b-a)/t; 
    x=[a:h:b]; y=1./(1+x.^2);
    xx=5-5./t; yy=1./(1+xx.^2);
    for j=1:m
        zz=lagelangri(x, y, xx);
    end
    yy
    zz
    Rf=yy-zz
end