Question

求助 MATLAB

Given x(n)=[1,2,3,4],
Please calculate the DFT output of this sequence with Matlab,
Please plot magnitude, real part, imaginary part and phase angle of above DFT output.

Answer 1

close all;
%Given x(n)=[1,2,3,4],
x=[1,2,3,4],
figure;bar(x);
%Please calculate the DFT output of this sequence with Matlab,
X=fft(x);
%Please plot magnitude,
X_mag=abs(X);
figure;bar(X_mag);
%real part,
X_real=real(X);
figure;bar(X_real);
%imaginary part
X_imag=imag(X);
figure;bar(X_imag);
%phase angle
X_phase=angle(X);
figure;bar(X_phase);

Answer 2