Choosing specific columns and rows

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Abdulhakim Alezzi
Abdulhakim Alezzi 2020-8-31
评论： Abdulhakim Alezzi 2020-8-31
Hi everyone,
Is there anyone can help on the following matter :
I have a folder contains mualiple matfiles C1,C2,C3,C4.....C22. each mat files represent 30x30 matrix, named by (data).
1- I want to load all these files using for loop .
3- I want to pick up 8 rows and 8 columns from the 30x30 matrix from every matfile.
2- then i want to save them as y1, y2, y3,..... till y22.
I have tried this code to do the job, but the output was the same matrix for all the data
%%
N = 22;
D = 'path to the folder the files are saved';
for k = 1:N
F = fullfile(D,sprintf('C%d.mat',k));
S = load(F);
Y = data ([5:7 19 22 24:26],[5:7 19 22 24:26]);
F = fullfile(D,sprintf('Y%d.mat',k));
save(F,'Y')
end
  2 个评论
Stephen23
Stephen23 2020-8-31
Note that
D = 'path to the folder where the files are saved';
is unlikely to be the path to a valid folder. You should change that string so that it refers to a valid folder (just as the string states).
Abdulhakim Alezzi
Abdulhakim Alezzi 2020-8-31
Dear Stephen,
Actully I did not want to show my folder's name here . but in the actual code i am using the right folder name.

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采纳的回答

Stephen23
Stephen23 2020-8-31
编辑：Stephen23 2020-8-31
Y = S.data(...);
^^ you need to access the field of structure S
https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-structure-array.html

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