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How to plot the frequency response of a discrete cosine function?

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Daniel Ramirez
Daniel Ramirez am 13 Nov. 2015
Kommentiert: Daniel Ramirez am 17 Nov. 2015
My attempt:
I tried doing it but I can't get the freq response to be plotted between pi and pi. Any help would be appreciated.

Antworten (1)

Rick Rosson
Rick Rosson am 14 Nov. 2015
Bearbeitet: Rick Rosson am 14 Nov. 2015
L = 1000;
n = 0:L-1;
x1 = fftshift(fft(x))/L;
dw = 2*pi/L;
w = -pi:dw:pi-dw;
stem(w,mag);
  5 Kommentare
Rick Rosson
Rick Rosson am 16 Nov. 2015
Try using stem instead of plot:
stem(w,phase/pi);
Daniel Ramirez
Daniel Ramirez am 17 Nov. 2015
Thank you so much Rick. It's working now.

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