code: def matching_line(freq, data, tref, bin_size=1):
      
      template_line = line_model(freq, data, tref=tref)
      # Measure amplitude and phase of the line in the data
      _, amp, phi = avg_inner_product(data, template_line,
                                      bin_size=bin_size)
      return line_model(freq, data, tref=tref, amp=amp, phi=phi)
docs: Find the parameter of the line with frequency 'freq' in the data.
  
      Parameters
      ----------
      freq: float
          Frequency of the line to find in the data.
      data: pycbc.types.TimeSeries
          Data from which the line wants to be measured.
      tref: float
          Reference time for the frequency line.
      bin_size: {1, float}, optional
          Duration of the bins the data will be divided into for averaging.
  
      Returns
      -------
      line_model: pycbc.types.TimeSeries
          A timeseries containing the frequency line with the amplitude
          and phase measured from the data.