csv data to fft in matlab

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Kyong Sun Bae 2021-12-5

评论： Kyong Sun Bae 2021-12-5

this 1_20mhz.csv data is time domain signal

one of vector means time and the last one is Voltage of the signal

i want to change this csv data to fft in matlab

(time, voltage) -> (frequency , magnitude)

Chunru 2021-12-5

编辑：Chunru 2021-12-5

x = readmatrix("1_20mhz.csv");

n = size(x, 1);

fs = 1/diff(x(1:2)) % sampling frequency

fs = 5.0000e+07

y = fft(x(:,2));

f = (0:n-1)/n*fs;

%plot(f, abs(y))

plot(f/1e6, 20*log10(abs(y)))

xlabel('f(MHz)'); ylabel('Amp (dB)'); grid on

xlim([1.9 20])

Kyong Sun Bae 2021-12-5

holy moly i love you so much!! thank you very much

Kyong Sun Bae 2021-12-5

but i want to before answer that you replied

can you bring me the code that you replied first at my question?

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