FFT of 100 data points

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happy
happy on 24 Nov 2011
Answered: Ryan T on 18 Mar 2016
Hi..
my problem is this:
I have 100 data taken from 0 to 346.5 microseconds. the time interval for each data is 3.5 microseconds. I need to plot the FFT of this data. Please help me..
Thank you very much.

Answers (2)

Amith Kamath
Amith Kamath on 24 Nov 2011
if x is your data,
L=length(x);
dt=3.5*10^(-6); %time.
fs=1/dt;
t=(0:1:L-1)*dt; %If you'd like to plot the time signal: plot(t,x)
out=fft(x,L)/L;
figure, plot(fs/2*linspace(0,1,(length(out)/2)+1),abs(out(1:(length(out)/2)+1))),title('One sided Spectrum')
xlabel('Normalized frequency')
ylabel('Magnitude')
  1 Comment
happy
happy on 26 Nov 2011
Thank you very much! :D
This is a great help to me..
Thank you again... :)

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Ryan T
Ryan T on 18 Mar 2016
This was extremely helpful... Thank you Amith!

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