Question
Hello, A comb function is an array of delta functions spaced equally. I want to plot a function like this. F(x)= comb(2x)*sinc(50x).sinc^2(x). I could manage the sinc and the sinc^2. But I don't understand how I can plot the comb function which is a summation of deltas from -inf to +inf
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Expert Answer
Kshitij Singh
PhD Expert
Answered Aug 16, 2026
You can simply create a discrete-time (Kronecker delta) impulse and repeat that. For example:
x = 0:(2*pi)/1000:pi-(2*pi)/1000; diraccomb = zeros(size(x)); diraccomb(1) = 1; diraccomb = repmat(diraccomb,1,10); xnew = 0:(2*pi)/1000:(5000*(2*pi)/1000)-(2*pi)/1000;
The above is a Dirac comb spaced at pi. You can easily modify for any sampling grid or period.
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