def sigma2_R(self, R, kwargs_mass, kwargs_light, kwargs_anisotropy):
        """
        returns unweighted los velocity dispersion for a specified projected radius

        :param R: 2d projected radius (in angular units)
        :param kwargs_mass: mass model parameters (following lenstronomy lens model conventions)
        :param kwargs_light: deflector light parameters (following lenstronomy light model conventions)
        :param kwargs_anisotropy: anisotropy parameters, may vary according to anisotropy type chosen.
            We refer to the Anisotropy() class for details on the parameters.
        :return:
        """
        I_R_sigma2 = self.I_R_simga2(R, kwargs_mass, kwargs_light, kwargs_anisotropy)
        I_R = self.lightProfile.light_2d(R, kwargs_light)
        return I_R_sigma2 / I_R
def sigma2_R ( self , R , kwargs_mass , kwargs_light , kwargs_anisotropy ) : I_R_sigma2 = self . I_R_simga2 ( R , kwargs_mass , kwargs_light , kwargs_anisotropy ) I_R = self . lightProfile . light_2d ( R , kwargs_light ) return I_R_sigma2 / I_R
returns unweighted los velocity dispersion for a specified projected radius

        :param R: 2d projected radius (in angular units)
        :param kwargs_mass: mass model parameters (following lenstronomy lens model conventions)
        :param kwargs_light: deflector light parameters (following lenstronomy light model conventions)
        :param kwargs_anisotropy: anisotropy parameters, may vary according to anisotropy type chosen.
            We refer to the Anisotropy() class for details on the parameters.
        :return: