Loop Files from a Directory

9 次查看（过去 30 天）
Qingsheng Bai
Qingsheng Bai 2017-9-4
评论： Qingsheng Bai 2017-9-4
Hi, I want to loop files in a folder. I used the following method:
datadirs = dir('../Inputdata/URL2');
dircell = struct2cell(datadirs)' ;
filenames = dircell(:,1);
datafilename =strcat('../Inputdata/URL2/',filenames(3)); %just a try.
fid = fopen(datafilename);
It gives me an error message.
But when I used:
ff = '../Inputdata/URL2/2017032312_8952.txt'; %(The same as the "datafiename").
fid = fopen(ff);
It worked.
WHY!!!
How to fix the problem?
  3 个评论
显示 1更早的评论
Stephen23
Stephen23 2017-9-4
编辑：Stephen23 2017-9-4
@Qingsheng Bai: instead of making up your own complicated and buggy syntax, you would be much better off simply copying the examples shown in the MATLAB documentation:
https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html
or from here:
https://www.mathworks.com/matlabcentral/answers/57446-faq-how-can-i-process-a-sequence-of-files
And to build the path strings you should definitely use fullfile instead of strcat.
KL
KL 2017-9-4
Valid point Stephen. Edited my answer.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

KL
KL 2017-9-4
编辑：KL 2017-9-4
Change
datafilename =strcat('../Inputdata/URL2/',filenames(3));
to
datafilename =fullfile('../Inputdata/URL2',filenames{3});
and if you're only playing with txt files, then why not
datadirs = dir('../Inputdata/URL2/*.txt');

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 File Operations 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by