def extract_parameters(self, P_mbar, P_Error, method="chang"):
        """
        Extracts the Radius, mass and Conversion factor for a particle.

        Parameters
        ----------
        P_mbar : float 
            The pressure in mbar when the data was taken.
        P_Error : float
            The error in the pressure value (as a decimal e.g. 15% = 0.15)
        
        Returns
        -------
        Radius : uncertainties.ufloat
            The radius of the particle in m
        Mass : uncertainties.ufloat
            The mass of the particle in kg
        ConvFactor : uncertainties.ufloat
            The conversion factor between volts/m

        """

        [R, M, ConvFactor], [RErr, MErr, ConvFactorErr] = \
            extract_parameters(P_mbar, P_Error,
                               self.A.n, self.A.std_dev,
                               self.Gamma.n, self.Gamma.std_dev,
                               method = method)
        self.Radius = _uncertainties.ufloat(R, RErr)
        self.Mass = _uncertainties.ufloat(M, MErr)
        self.ConvFactor = _uncertainties.ufloat(ConvFactor, ConvFactorErr)

        return self.Radius, self.Mass, self.ConvFactor
Extracts the Radius, mass and Conversion factor for a particle.

        Parameters
        ----------
        P_mbar : float 
            The pressure in mbar when the data was taken.
        P_Error : float
            The error in the pressure value (as a decimal e.g. 15% = 0.15)
        
        Returns
        -------
        Radius : uncertainties.ufloat
            The radius of the particle in m
        Mass : uncertainties.ufloat
            The mass of the particle in kg
        ConvFactor : uncertainties.ufloat
            The conversion factor between volts/m