Read different file in certain category

2016 3 3
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更新时间：2016 3 4
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If I have some file folders, like '19800101', '1980012',... '19801201',... In each file, it have a .mat file. I want to deal with folder according to if their belong to same month. like, .mat file in folder '19800101' and '19800102' should be done with same action.

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per isakson
per isakson 2016-3-3
"In each file" &nbsp should that be "In each folder"?
Jason
Jason 2016-3-3
Yes. In each folder. Thanks for correction

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Ahmet Cecen
Ahmet Cecen 2016-3-3

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Grab a list of all the folders in a given month using something like:
files = dir('198001*');
Check MATLAB Regex for more elaborate sub-set extraction schemes you might need later here: http://www.mathworks.com/help/matlab/ref/regexp.html
You can then read all mat files in those folders with a for loop like:
for k = 1:length(files)
Data{k} = load([files(k).name,'\nameofmatfileinside.mat']);
end
This assumes the name of the matfile is the same inside all of those folders, which I suspect is the case. Also the direction of the directory slash might differ based on operating system.

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Jason
Jason 2016-3-3
Thanks for reply. What about the name of matfile is different, its name is the folder name, like '19800101.mat'?
Jason
Jason 2016-3-3
I write by myself. I think it is works.
Data{k}=load([files(k).name, '\', files(k).name, '.mat'])
Jason
Jason 2016-3-3
for "files = dir('198001*');" it seems to me I only can create it 12 times since there are 12 months? do you have more efficient way?
Ahmet Cecen
Ahmet Cecen 2016-3-3
Something along the lines of the below should work:
for i=1:12
if i<10
currentrgx = ['19800',num2str(i),'*'];
else
currentrgx = ['1980',num2str(i),'*'];
end
files = dir(currentrgx);
end
Jos (10584)
Jos (10584) 2016-3-3
No need for an if-statement:
for i=1:12,
currentgrx = sprintf('1980%02d*',i)
% files = dir(currentrgx);
end
Jason
Jason 2016-3-4
Thanks for providing such efficient algorithm

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