z transform in matlab

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Ritesh_i16

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Can you please tell me what do these lines mean?

1) w = linspace(0.1,100,200);

2)H = 2500*(10+j*w)./(j*w.*(2+j*w).*(2500+j*w*30+(j*w).^2));

3)plot(w,unwrap(angle(H))*180/pi);


I am a beginner in matlab
 

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