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I am trying to run the given code below

w = fft(y);
a1 = abs(w);
a2= a1(0:length(w)/2-1);
g = (0:(length(w)/2)-1)*fs/length(w);
figure;
subplot(2,1,1)
plot(g,a2);
title('FFT of X(k): Original signal');
xlabel('frequency(hz)');
ylabel('amplitude of frequency');

at the 

a2 = a1(0:length(w)/2-1);

matlab shows an error

"Subscript indices must either be real positive integers or logicals."

I have no idea what's going wrong.

Vega
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lyona
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1 Answers1

1

Index should one-based, so it should be 1:length(w)/2 and not 0:length(w)/2-1

isp-zax
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