At frequency f >10^6, the program is very slow to calculate the FFT. Please let me know if there is a faster method. Thank you. Regards HDaniel
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% fft_sinewave_1.m
Fs=1*10^7;
t = 0:1/Fs:1;
v = 1;
f = 10^6;
y = v*sin(2*pi*f*t);
nfft=1024;
Y = fft(y,nfft);
Y=Y(1:nfft/2);
mx=abs(Y);
f=(0:nfft/2-1)*Fs/nfft;
plot(f,mx);
grid on;
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John D'Errico
2016년 3월 4일
There is no magic to be had. You can alway make any problem sufficiently large that is starts to take appreciable time to run. Had you a bigger, faster computer, you would have asked the same question, just with a bigger problem.
So, get a cup of coffee and relax. Read a book while it does its work. Or try to solve smaller problems. Or find a bigger, faster computer.
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