fgl                   package:MASS                   R Documentation

_M_e_a_s_u_r_e_m_e_n_t_s _o_f _F_o_r_e_n_s_i_c _G_l_a_s_s _F_r_a_g_m_e_n_t_s

_D_e_s_c_r_i_p_t_i_o_n:

     The `fgl' data frame has 214 rows and 10 columns. It was collected
     by B. German on fragments of glass collected in forensic work.

_A_r_g_u_m_e_n_t_s:

      RI: refractive index; more precisely the refractive index is
          1.518xxxx.

          The remaining 8 measurements are percentages by weight of
          oxides. 

      Na: sodium 

      Mg: manganese 

      Al: aluminium 

      Si: silicon 

       K: potassium 

      Ca: calcium 

      Ba: barium 

      Fe: iron 

    type: The fragments were originally classed into seven types, one
          of which was absent in this dataset.  The categories which
          occur are  window float glass (`WinF': 70), window non-float
          glass (`WinNF': 76), vehicle window glass (`Veh': 17), 
          containers (`Con': 13),  tableware (`Tabl': 9) and vehicle
          headlamps (`Head': 29). 

_F_o_r_m_a_t:

     This data frame contains the following columns:

