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with an example can anyone plz show how will be the frequency domain value look like after it is transformed from time domain using fast fourier transform

1 次查看（过去 30 天）
divijesh puninchathaya
关闭： MATLAB Answer Bot 2021-8-20
GIVEN A SET OF TIME DOMAIN VALUES.
AFTER APPLYING FAST FOURIER TRANSFORM TO THOSE WHAT WILL BE THE OUTPUT
IT WILL BE CONVERTED FROM TIME DOMAIN DATA TO FREQUENCY DOMAIN BUT MY QUESTION IS WILL IT BE COMPLEX VALUE CONTAINING REAL AND IMAGINARY PART
PLZ ANSWER. IF YES PLZ SHOW ME WITH AN EXAMPLE.

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回答（3 个）

Arnaud Miege
Arnaud Miege 2011-4-8
Have a look at the documentation for the fft function.
HTH,
Arnaud
  1 个评论
Giuseppe Naselli
Giuseppe Naselli 2013-10-25
Arnaud,
have you ever thought that most of the people who wrote in here have already looked at the documentation (failing to understand what they are looking at)?
I have been using this community for about 1 year now and from my experience 51% of your answers see to be always
"Have a look at the documentation for the blablabla function"
Make you a favor and avoid to loose time in giving such sort of answers, they definitely do not help AT ALL!
Sean de Wolski
Sean de Wolski 2011-4-8
fft2(magic(3))
Walter Roberson
Walter Roberson 2011-4-8
It is not guaranteed that the transformed data will contain a complex part, but containing complex parts would be by far the most common situation. If no complex part is contained then the situation is the same as if all the complex parts happened to come out exactly 0.

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