Sets the transducer of signal edfsignal
edf_set_transducer(edf_handle, edfsignal, transducer)
integer containing file handle of the opened bdf/edf-file
Minimum value is 1
string containing the transducer text of the signal edfsignal.
Sets the transducer of signal edfsignal ("AgAgCl cup electrodes", etc.)
This function is optional for every signal and can be called only after opening a file in writemode and before the first sample write action.