filter.m

基于Matlab编写的用于对数据进行插值分析和傅立叶变换的程序

clear all; 
clc

N=40;%滤波器阶数 
W1=0.1; 
W2=0.2;%通带W1<W<W2 
B=fir1(N,[W1 W2],hanning(N+1)); 
x=0:0.001:1; 
y=sin(x)+sin(30*x)+sin(100*x)+sin(1000*x)+sin(0.1*x); 
y1=filter(B,1,y);
figure
subplot(211)
plot(x,y,'r'); 
subplot(212)
plot(x,y1)