A relative path is always searched for first with respect to the current directory. Two file identifiers are automatically available and need not be opened. Input Arguments filename — Name of file to open character vector or string scalar Name of the file to open, including the file extension, specified as a character row vector or a string scalar.
Once all data has been read from or written to the opened file it should be closed. The third form of the fopen function returns information about the open file given its file id. If the flag TempFile is given, the default mode is Write. If it has a value, a new file is created or an existing file is searched for in the corresponding folder.
On Unix, text and binary mode are the same so this has no effect. An invalid fid returns empty strings for all output arguments. The allowed encodings are: "Big5".