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Section: Operating System Functions
In some versions of FreeMat (pre 3.1), the dir function was aliased to the ls function. Starting with version 3.1, the dir function has been rewritten to provide compatibility with MATLAB. The general syntax for its use is 
dir
in which case, a listing of the files in the current directory are output to the console. Alternately, you can specify a target via
  dir('name')
or using the string syntax
dir name
 If you want to capture the output of the dir command, you can assign the output to an array 
  result = dir('name')
 (or you can omit 'name' to get a directory listing of the current directory. The resulting array result is a structure array containing the fields: 
name the filename as a string  date the modification date and time stamp as a string  bytes the size of the file in bytes as a uint64  isdir a logical that is 1 if the file corresponds to a directory.  Note that 'name' can also contain wildcards (e.g., dir *.m to get a listing of all FreeMat scripts in the current directory.