Fourier transform code issues obtaining frequency domain

Hello, I am currently trying to run some code to obtain the frequency domain for the vibrations of a cantilever beam using experimental data. The data has been uploaded correctly etc as I have obtained and plotted the time domain so the problem seems to be with the fourier code as I obtain no data running this code, could someone please tell me where I am going wrong? Also attached is the text file with the experimental data.

% a programme for calculating the frequency domain representation of a time domain signal

data = input ('beamwithoutmassdata'); %read the time domain data into the programme

Fs = input ('500'); %read the sample frequency

nfft = input ('2^16');

X=fft(data,nfft); % perform a fast fourier transform on the array data

X=X(1:nfft/2); % The FFT is symetrical so lose the second half

mx=abs(X); % take the absolute value of X

f=(0:nfft/2-1)*(Fs/nfft);

plot(f,mx)

Answer 1

[Abhishek Ballaney]

https://in.mathworks.com/help/matlab/ref/fft.html