How can I fopen files in different directory

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Vinoth S 2020-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/501907-how-can-i-fopen-files-in-different-directory

评论： Vinoth S 2020-1-25

采纳的回答： Stephen23

How can I fopen files that are in a different directory than current directory, fopen always returns -1.

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Answer 1

Stephen23 2020-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/501907-how-can-i-fopen-files-in-different-directory#answer_411932

在 MATLAB Online 中打开

Do NOT follow advice of just adding more directories to the Search Path: this just pointlessly slows MATLAB down (MATLAB has to keep track of all of the files in all folders on the Search Path). In general you should NOT add data folders to the search path, because all MATLAB functions that import/export data files accept relative or absolute filenames, and this is much more efficient than bloating the Search Path. For example:

D = 'E:\mails spamnon\non spam';
S = dir(fullfile(D,'*.*'));
for k = 1:numel(S)
    F = fullfile(D,S(k).name);
    fid = fopen(F);
    ...
    fclose(fid);
end