拉格朗日插值matlab程序(共4页).docx

精选优质文档-倾情为你奉上拉格朗日插值的调用函数function y=lagrange(x0,y0,x)n=length(x0);m=length(x);for i=1:m z=x(i); L=0.0; for j=1:n T=1.0; for k=1:n if k=j T=T*(z-x0(k)/(x0(j)-x0(k); end end L=T*y0(j)+L; end y(i)=L;end四个图在一起：x=-1:0.05:1;y=1./(1+25*x.2);x0=-1:0.4:1;y0=1./(1+25*x0.2);y1=lagrange(x0,y0,x);x0=-1:0.2:1;y0=1./(1+25*x0.2);y2= lagrange(x0,y0