Need help getting my delta functions to work

2 次查看(过去 30 天)
I'm trying to take the Fourier transform of two delta function but I'm having a problem with writing the code for my delta functions. The two functions are x = [1,0,0,0,....,0,0,0]; n=0...nfft-1 and y = x = [0,0,0,1,....,0,0,0]; n=0...nfft-1. The length of my fft (nfft) is 150. So far what I have is
nfft = 150;
x = [1,0,0,0:0:nfft-1];
y = [0,0,0,1,0:0:nfft-1];
but my vectors are x = [1,0,0] and y = [0,0,0,1]. They should be x = [1,0,0,.....0,0,0] and y = [0,0,0,1,0,0.....,0,0,0] from n=0 to nfft-1.

采纳的回答

Paul
Paul 2021-10-15
The problem is that
nfft = 150;
0:0:nfft-1
ans = 1×0 empty double row vector
is empty. What that line is bascially asking for is a vector of number from 0 to 149 in increments of 0, which doesn't make sense, hench the empty result. If I understand the question correclty, you really want this
x = zeros(1,nfft);
x(1) = 1;
y = zeros(1,nfft);
y(4) = 1;

更多回答(0 个)

类别

Find more on Get Started with MATLAB in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by