I havea trouble plotting the Frequency response of a fourier transform

Dear All, Please guide me that how can I plot the frequency response from the Fourier transform of impulse response. I estimated the impulse response from the sensor. I took the fourier transform of the impulse response. Now I want to see the frequency response. I should be very greatful if somebody help me in this regard.

Thanks in advance

Answer 1

[Matt J]

Use the PLOT command

[Tariq]

I have done the hand calculation of the fourier transform. The numerator involved the imag part and denominator is like a quardatic equation. Would you please tell me how this PLOT command will help me.

[Matt J]

If you evaluate the transform (or the real part of it or the ABS of it) that you've calculated at different points, you can plot those points using the PLOT command. You said that this is what you wanted to do.

[Tariq]

The evaluated answer is look like this: H(f)=j*8*PI*tau*f/(1+4*PI^2*tau^2*f^2)^2 Now I don't know how to plot amplitude frequency response. Does it make sense?

[Matt J]

Here's an alternative using FPLOT,

H= @(f) abs(j*8*pi*tau*f/(1+4*pi^2*tau^2*f^2)^2);

fplot(H,[-3,3])

[Tariq]

Thanks, it works fine.