edf_set_prefilter(edf_handle, edfsignal, prefilter)
Sets the prefilter of signal edfsignal ("HP:0.1Hz", "LP:75Hz N:50Hz", etc.).
integer containing file handle of the opened bdf/edf-file
Minimum value is 1
string containing the prefilter text of the signal edfsignal
Sets the prefilter of signal edfsignal ("HP:0.1Hz", "LP:75Hz N:50Hz", 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.