List all the files and folders in the current directory

Syntax: dir

    或者 dir('.')

List the contents of a folder

Syntax: dir VIP_1  % VIP_1 is the name of a folder contained in the current working directory.

            dir /Volumes/DATA/VIP_1/  % the path of the folder VIP_1.

List all the dat files in the current folder

Syntax: dir *.dat

   或者  dir('*.dat')

List all the txt files that contain the term acs (the files and folders in VIP_1) with 5 fields in a structure array:

Syntax: FileInfo=dir *acs*.txt

            FolderInfo=dir VIP_1

Output:

            name       % file or folder name  --character vector

            date         % modification date timestamp  --character vector

            bytes        % size of the file in bytes  --double vector

            isdir          % if name is a directory, 1--True, 0--False  --logical vector

            datenum   % modification date as serial date number  --double vector

Get a field of a file.

Syntax: ACsFile=dir acs01.dat;

            FileName=ACsFile.datenum;   % get the datenum field of the file structure array.

！DO NOT use the datenum function to convert the string returned in the date field of the structure to a number. The results of the datenum function vary depending on the locale. Instead, use the datenum field.