File does not exist error....

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JB
JB 2015-12-20
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
  2 个评论
Walter Roberson
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
JB 2015-12-21
编辑：JB 2015-12-21
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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回答（2 个）

Image Analyst
Image Analyst 2015-12-21
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
Walter Roberson
Walter Roberson 2015-12-21
[~, name, ~] = fileparts(filename);
  1 个评论
Image Analyst
Image Analyst 2015-12-21
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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