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.

_U_s_a_g_e:

     fgl

_F_o_r_m_a_t:

     This data frame contains the following columns:

     '_R_I' refractive index; more precisely the refractive index is
          1.518xxxx.

          The remaining 8 measurements are percentages by weight of
          oxides.

     '_N_a' sodium

     '_M_g' manganese

     '_A_l' aluminium

     '_S_i' silicon

     '_K' potassium

     '_C_a' calcium

     '_B_a' barium

     '_F_e' iron

     '_t_y_p_e' 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).

_R_e_f_e_r_e_n_c_e_s:

     Venables, W. N. and Ripley, B. D. (2002) _Modern Applied
     Statistics with S._ Fourth edition.  Springer.

