listing files in textfile

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[Walter Roberson]

The fprintf() could be simplified to

fprintf(fff, '%s\n', fileNames{i});

Answer 1

[Walter Roberson]

The order of files returned by dir() is "whatever is returned by the underlying operating system". In turn operating systems might use different orderings depending on the variety of filesystem being used.

You must therefore sort the names before you print them out. See http://www.mathworks.com/matlabcentral/fileexchange/8399-sortn-sort-textual-lists