R language uses file of FS package_ Access function, file_ Exists function, dir_ Exists function, link_ The exists function checks whether the file can be accessed, whether the file exists, whether th

R Language use fs Bag file_access function 、file_exists function 、dir_exists function 、link_exists Function to check whether the file can be accessed 、 Does the file exist 、 Whether the directory exists 、 Whether the hyperlink exists

Catalog