www.gusucode.com > MATLAB仿真技术与应用__的配套例题和习题的matlab源代码 > 第四章/example5.m

    %MATLAB program 4-5
%Spectra analysis
clear all;
clc;
Fs=64;
N=64;
t=1/Fs;
f1=4;f2=8;f3=10;
n=0:N-1;
x=cos(2*pi*t*f1*n)+cos(2*pi*t*f2*n)+cos(2*pi*t*f3*n);
stem(x);
y=t*abs(fft(x,N));
figure;
stem(y,'*');