Arguments
folder
logical, TRUE all files in folder will be
imported, FALSE only selected file will be imported.
suffix
string, only files with specified suffix
will be imported.
prefix
string, only files with specified prefix
will be imported.
fileName
string if file name is provided file will
be imported without showing the file open dialogue.
folderName
string if folder name is provided files
in folder will be imported without showing the select
folder dialogue.
extension
string providing the file extension.
debug
logical indicating printing debug
information.