Plotting Fourier Transform - HELP PLEASE

Consider a pulse of amplitude 1 and time duration 1 second. Sample this pulse at 20 samples/sec for 20 seconds and compute and plot the Discrete Fourier Transform (DFT).

I need the matlab code for this problem. I have not much knowledge of matlab.

Thank you very much

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/8026-best-way-s-to-master-matlab

Answer 1

[Rick Rosson]

What have you tried to do so far?

Answer 2

[Walter Roberson]

Insufficient information about the shape of the pulse.

[Rick Rosson]

I assume the professor is asking for a rectangular pulse, but as you said, it is impossible to know for sure...

Answer 3

[Rick Rosson]

>> doc fft
>> doc fftshift
>> doc abs
>> doc plot

Answer 4

[Rick Rosson]

Please check out this online interactive tutorial:

MATLAB Interactive Tutorial

HTH.

Rick

Answer 5

[Rick Rosson]

You're welcome.