Opens an new file for writing.
[edf_handle]=edfopen_file_writeonly(path, filetype, number_of_signals)
: string containing the path and name of the file
: 0 = EDFLIB_FILETYPE_EDFPLUS
: 1 = EDFLIB_FILETYPE_BDFPLUS
: number_of_signals defines the number of signals that can be saved in the file
: handle of the opened file
Opens an new file for writing. Warning, an already existing file with the same name will be silently overwritten without advance warning! Returns a handle on success, you need this handle for the other functions. In case of an error, it returns a negative number . This function is required if you want to write a file..