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Plotting Fourier Transform - HELP PLEASE

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Chance
Chance 2012-3-15
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
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Walter Roberson
Walter Roberson 2012-3-15
http://www.mathworks.com/matlabcentral/answers/8026-best-way-s-to-master-matlab

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回答（5 个）

Rick Rosson
Rick Rosson 2012-3-15
What have you tried to do so far?
Walter Roberson
Walter Roberson 2012-3-15
Insufficient information about the shape of the pulse.
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Rick Rosson
Rick Rosson 2012-3-15
I assume the professor is asking for a rectangular pulse, but as you said, it is impossible to know for sure...

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Rick Rosson
Rick Rosson 2012-3-15
>> doc fft
>> doc fftshift
>> doc abs
>> doc plot
Rick Rosson
Rick Rosson 2012-3-15
Please check out this online interactive tutorial:
MATLAB Interactive Tutorial
HTH.
Rick
Rick Rosson
Rick Rosson 2012-3-19
You're welcome.

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