interpft_example.m

from start to grasp the matlab

%interpft_example.m
%一维快速傅立叶插值实现数据增采样
x = 0:1.2:10; 
y = sin(x); 
n = 2*length(x);               %增采样1倍
yi = interpft(y,n);            %一维快速傅立叶插值
xi = 0:0.6:10.4;               
hold on;                       
plot(x,y,'ro');                %画图  
plot(xi,yi,'b.-');
title('一维快速傅立叶插值');
legend('原始数据','插值结果');