How to read files from sub folders in sorted order?

Question

Parthiban C 2018-8-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/414325-how-to-read-files-from-sub-folders-in-sorted-order

评论： Stephen23 2022-1-19

Sub folder names are something like this. Time_0, Time_0.5, Time_1, Time_2, Time_10. The file name in all the sub folders are same. Matlab sort these folder names in the order Time_0, Time_0.5, Time_1, Time_10, Time_2. But I want the files to be loaded from smallest to largest time. Someone Please help me with this?

2 个评论
显示无隐藏无

kondepati sudhir kumar 2019-11-7

the answer by konard and stephen is good but if you sort by time does'nt give good results then you can use this code

d = dir('Time*');

for i=1:length(d)

folder(i,1)=string(d(i).name);

end

t_char = regexp(folder,'\_','split');

ar= str2double(ar);

[~,idx] = sort(ar);

folder = folder(idx);

Stephen23 2022-1-19

编辑：Stephen23 2022-1-19

"the answer by konard and stephen is good but if you sort by time does'nt give good results..."

My answer doesn't just sort by "Time", but sorts by the entire content of the foldernames, incuding the number values.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Konrad 2018-8-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/414325-how-to-read-files-from-sub-folders-in-sorted-order#answer_332284

编辑：Konrad 2018-8-10

在 MATLAB Online 中打开

Hi, one solution would be to convert the time suffix to numeric and sort the numbers:

d = dir('Time*');
n = {d.name};
t_char = regexp(n,'\-?[\d\.]+$','match','once');
t_num = str2double(t_char);
[~,idx] = sort(t_num);
d_sort = d(idx);

Hope this helps. Best, Konrad

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Stephen23 2018-8-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/414325-how-to-read-files-from-sub-folders-in-sorted-order#answer_332289

编辑：Stephen23 2022-1-19

在 MATLAB Online 中打开

The simplest solution is to download my FEX submission natsortfiles, which was written to solve exactly the problem that you are having:

https://www.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort

There are plenty of examples in the Mfile help, the online documentation, and also in the HTML examples. Note that

because the numbers include decimal values you will need to specify the regular expression.
because you are sorting foldernames you will need to specify the 'noext' option.

D = 'path where subfolders are';
S = dir(fullfile(D,'Time_*'));
S = natsortfiles(S([S.isdir]),'\d+\.?\d*','noext')

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Stephen23 2022-1-19

在 MATLAB Online 中打开

Example using a cell array:

C = {'Time_0', 'Time_1.5', 'Time_9.5', 'Time_1', 'Time_10', 'Time_2.5'};
D = natsortfiles(C,'\d+\.?\d*','noext')
D = 1×6 cell array
    {'Time_0'}    {'Time_1'}    {'Time_1.5'}    {'Time_2.5'}    {'Time_9.5'}    {'Time_10'}