How do I find output as the path of any input stored in cells?

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kd p 2017-12-3

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https://ww2.mathworks.cn/matlabcentral/answers/370715-how-do-i-find-output-as-the-path-of-any-input-stored-in-cells

关闭： MATLAB Answer Bot 2021-8-20

Suppose I have the main folder 'X' which has a subfolder 'a'. now a is like a linear array with n elements. Now picking any random element out of it, the output should show the path i.e, X\a\n. Like 'a' there would be columnar till z. So it would be like a rectangular matrix. Need urgent help with this

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kd p 2017-12-4

Pardon me @Walter. Actually, I had a deadline and I'm new here.

kd p 2017-12-4

It is analogous to a subfolder. I used the word to describe the paths as output. Input would be like I said in the image, the output would be just the path of the element of the desired position.

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回答（1 个）

Walter Roberson 2017-12-4

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https://ww2.mathworks.cn/matlabcentral/answers/370715-how-do-i-find-output-as-the-path-of-any-input-stored-in-cells#answer_294495

在 MATLAB Online 中打开

projectdir = fullfile('X', 'a');
dinfo = dir( projectdir );
dinfo(ismember({dinfo.name}, {'.', '..'})) = [];   %remove . and ..
numentries = length(dinfo);
random_entry_idx = randi(numentries);
random_entry_filename = dinfo(random_entry_idx).name;
random_name = fullfile(projectdir, random_entry_filename);

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Walter Roberson 2017-12-5

编辑：Walter Roberson 2017-12-5

在 MATLAB Online 中打开

projectdir = fullfile('X', 'a');
if ~exist(projectdir, 'dir')
  error('Folder "%s" does not exist relative to here', projectdir);
end
dinfo = dir( projectdir );
dinfo(ismember({dinfo.name}, {'.', '..'})) = [];   %remove . and ..
numentries = length(dinfo);
if numentries == 0
  error('Folder "%s" exists but has no files in it', projectdir);
end
random_entry_idx = randi(numentries);
random_entry_filename = dinfo(random_entry_idx).name;
random_name = fullfile(projectdir, random_entry_filename);

kd p 2017-12-5

Thank You, Walter. Could you kindly say what does the "remove '.' and '..' parts mean? Like I have to edit something in it or totally remove them? And besides, the code is showing error in the output

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