code: def _set_default_init_params(self):
          
          if self.verbose:
              print('Initializing using default parameters')
          # Multiply the specified ecg thresholds by the filter and mwi gain
          # factors
          qrs_thr_init = self.qrs_thr_init * self.transform_gain
          qrs_thr_min = self.qrs_thr_min * self.transform_gain
  
          qrs_amp = 27/40 * qrs_thr_init
          noise_amp = qrs_amp / 10
          rr_recent = self.rr_init
          last_qrs_ind = 0
  
          self._set_init_params(qrs_amp_recent=qrs_amp,
                                noise_amp_recent=noise_amp,
                                rr_recent=rr_recent,
                                last_qrs_ind=last_qrs_ind)
  
          self.learned_init_params = False
docs: Set initial running parameters using default values.
  
          The steady state equation is:
            `qrs_thr = 0.25*qrs_amp + 0.75*noise_amp`
  
          Estimate that qrs amp is 10x noise amp, giving:
            `qrs_thr = 0.325 * qrs_amp or 13/40 * qrs_amp`