Sets the minimum physical value of signal edfsignal.
edf_set_physical_minimum(edf_handle, edfsignal, phys_min)
: integer containing file handle of the opened bdf/edf-file
: Minimum value is 1
: double containing the minimum physical value of the signal edfsignal.
This function is required for every signal and can be called only after opening a file in writemode and before the first sample write action.