MATLAB: Need to convert excel (time domain data ) to frequency domain data

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i have excel (.csv) file … that is time vs acceleration data for cantilever beam. i need to convert in to frequency domain for find out natural frequency of cantilever beam

Best Answer

  • Assuming the Excel file contains time data in column 1 and acceleration data in column 2
    % read data
    data=xlsread('fileName.xlsx');
    % frequency analysis
    y=fft(data(:,2));
    len=length(data(:,1));
    n=0:len-1;
    fs=50; % mention your sampling freq
    N=n*fs/(len-1);
    plot(N,abs(y));
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