Codes for spectral densities

2020 6 26
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HI everyone
I am very new to MATLAB
I wanted to calculate cross spectral density and auto spectral density of the excel data.
I have attached an excel file.
First colum in displacement in X direction and second column is displacement in Y direction
Total no. of datas for each column is 16384 (which are the displacements data from 0 second to 16384 seconds respectively)
Can anyone provide me with MATLAB codes for calculating Sxx and Syx (cross and auto spectral densities) respectively.
And also the x axis plot in frequency and explanation of the x axis plotting.
Thanks for Readind

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