06-25.txt

来自「MATLABR2006a基础教程」· 文本 代码 · 共 18 行

try 
   [d, x] = readimage(imageFile);
catch
   err = lasterror;
   switch (lower(err.identifier))
   case 'MATLAB:nosuchfile'
      error('DisplayImg:nosuchfile', ...
            'File "%s" does not exist.', filename);
   case 'MyFileIO:noaccess'
      error('DisplayImg:noaccess', ...
            ['Can''t open file "%s" for reading\n', ...
             'You may not have read permission.'], filename);
   case 'MyFileIO:invformat'
      error('DisplayImg:invformat', ...
            'Unable to determine the file format.');
   end
end