fftp1_beike.m

经典《信号与系统》教程的matlab例程,对深入理解信号与系统相关概念有很大帮助

% Name:FFTp
clear
N=1024;%input('Type in the DFT length N=');
M=log2(N);
k=0:N-1;
x=[0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15];%input('Type in the sequence x(n)=');

Xk=fft(x,N)
stem(k,abs(Xk),'.')