File does not exist error....

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JB 2015-12-20

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评论： Image Analyst 2015-12-21

Hello all,

I am reading .hdf files from a folder, matlab reads some of the files and for the remaining files, it gives an error:

file xxx.hdf does not exist.

While i have re-checked the folder all files are there...

Thanks

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Walter Roberson 2015-12-20

Please show your code.

Please also show the output of dir() applied to the file, and show the output of fileattrib() applied to the file.

JB 2015-12-21

编辑：JB 2015-12-21

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Sorry for inconvience, i found the mistake. I have another query.For e.g I have

 filename='Stringname.txt' OR
 filename='Stringname2.txt'

how can i read the name or name2 for the same variable filename. Note:A folder may have any of the filenames described above.

thanks alot

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Answer 1

Image Analyst 2015-12-21

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JB, try this:

folder = pwd; % Whatever
fullFilename = fullfile(folder, 'Stringname.txt')
if exist(fullFilename, 'file') == -1
  % First filename does not exist.
  % Try the other filename.
  fullFilename2 = fullfile(folder, 'Stringname2.txt')
  if exist(fullFilename2, 'file') == -1
    % Neither file exists.
    errorMessage = sprintf('Neither filename exists:\n%s\nor\n%s', fullFilename, fullFilename2);
    uiwait(warndlg(warningMessage));
  else
    % The second filename exists.
    fullFilename = fullFilename2;
  end
end

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Answer 2

Walter Roberson 2015-12-21

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[~, name, ~] = fileparts(filename);

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Image Analyst 2015-12-21

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I think he says he's looking for two possible filenames: it might be either "xxx.hdf" or "xxx2.hdf". I suggest using dir() to find it.

allFileNames = dir('xxx*.hdf');

If there is only one, then the length of allFileNames will be exactly 1. If both of those files exist, or more, then length(allFileNames) will be 2 or more and then he'll have to decide which of the files to use.

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