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MATLAB Practice 6

#author("2022-06-06T12:43:37+09:00","default:mori","mori")
#author("2022-06-06T12:48:02+09:00","default:mori","mori")
*Read/write data + Fourier analysis [#ided5637]

- Read the -.mat data 'crf_wind.mat' and plot the first row component [u(1,:)].
- Read the .mat data 'crf_wind.mat' and plot the first row component [u(1,:)].
u is the wind speed data and the dimension is [m/s], the horizontal axis is time, the increment is dt, and the dimension is [s]. 
 # load 
- Load the text data 'crf_wind.dat', plot the first row component [u(1,:)], and compare it with u(1,:) in the .mat data. The data format of 'crf_wind.dat' is in Appendix 1. 
 # fopen, fscanf, fclose 
Calculate the spectrum of -u(1,:) and plot it on the logarithmic axis. 
 # logloglog 
- Save the computed values in matlab format
 # save


*Data [#qae49bf7]

- [[Text data>Home:files/education/crf_wind.dat]]
- [[Matlab binary data>Home:files/education/crf_wind.mat]]

Ref.
 % Output format of crf_wind.dat
 filename_tmp = strcat('filename_w','.dat')
 fid = fopen( 'crf_wind.dat', 'w' )
 fprintf( fid, '%5d %5d\n', nt, nz )
 fprintf( fid, '%12.5e\n', dt )
 fprintf( fid, '%12.5e', z(1:nz) )
 fprintf( fid, '\n' );
 for iz=1:nz
   fprintf( fid, '%12.5e', u(iz,:) ); for iz=1:nz
   fprintf( fid, '\n' );
 end
 fclose(fid);