How can i implement fft on sine wave then plot it ?

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Hassan
Hassan 2014-9-27
评论： Image Analyst 2014-10-13
i want to do fft of the sin wave then want to see the plot of it

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Image Analyst
Image Analyst 2014-9-27
Did you try sin(), fft(), imag(), and real(), and plot()? I attach two demos that I have that do FFTs. They probably don't do exactly what you asked but they may be instructive anyway.
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Hassan
Hassan 2014-10-13
Thanks for your message i actually tried as in the attached picture to do FFT of the y function and no idea if what ive got is the fft of y function . if its right how can i plot it then ? . best regards
Image Analyst
Image Analyst 2014-10-13
What attached picture? Did you try either of my demos? To plot, have you tried the functions I listed?

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更多回答（1 个）

Rick Rosson
Rick Rosson 2014-9-27
doc sin
doc cos
doc fft
doc fftshift
doc abs
doc plot
doc stem
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Hassan
Hassan 2014-10-13
thanks for the message would u explain what doc mean cause i am new to matlab ? best regards

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