www.pudn.com > MATLABpro.rar > fx.m

%f(x)=sin(x) 
%x=0.5:0.2:1.9; 
%y=[0.4794,0.6442,0.7833,0.8912,0.9636,0.9975,0.9917,0.9463]; 
%x=-1:0.01:1; 
%y=1./(1+25*x.^2); 
%n=length(x); 
%x1=-0.9:0.1:0.9; 
function s=fx(x,y,x1) 
n=length(x); 
m=length(x1); 
for k=1:m 
    for i=1:n-1 
        if (x1(k)>=x(i)&x1(k)<=x(i+1)) 
           h(i)=x(i+1)-x(i); 
           t=(x1(k)-x(i))/h(i); 
           s(k)=(1-t)*y(i)+t*y(i+1); 
       end 
    end 
end 
%plot(x,y,x1,s,'k');