exp3_fft_sine.m

%% Computing FFT for Basic Signals and plot the spectra %%
%%   Author: A Arun Prakash Mail:[email protected]    %%
clc
close all;

%Generae sin signal of 10 Hz
  
Fs=1000; % Sampling Frequency > 2 * fmax , here fmax = 10
t=0:(1/Fs):1;
x=sin(2*pi*10*t);


%%% Your COde Goes Here to plot the spectra of x %%%

% First compute length of input
L=length(x);

% Check whether length is in power of 2
NFFT = 2^nextpow2(L)

% use this length to compute N-point FFT to the input
Y = fft(x,NFFT)/L;

% Plot the spectrum
f = Fs/2*linspace(-1,1,NFFT);
Y=fftshift(Y);
plot(f,2*abs(Y))
xlabel('Frequency (Hz)')
ylabel('|Y(f)|')


%% Approx 4 lines of code %%