glass                  package:kknn                  R Documentation

_G_l_a_s_s _I_d_e_n_t_i_f_i_c_a_t_i_o_n _D_a_t_a_b_a_s_e

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

     A data frame with 214 observations, where the problem is to
     predict the type of glass in terms of their  oxide content (i.e.
     Na, Fe, K, etc).  The study of classification of types of glass
     was motivated by  criminological investigation.  At the scene of
     the crime, the glass left can be used as evidence...if it is
     correctly identified!

_U_s_a_g_e:

     data(glass)

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

     A data frame with 214 observations on the following 11 variables.

     _I_d Id number.

     _R_I Refractive index.

     _N_a Sodium (unit measurement: weight percent in corresponding
          oxide, as are attributes 4-10).

     _M_g Magnesium.

     _A_l Aluminum.

     _S_i Silicon.

     _K Potassium.

     _C_a Calcium.

     _B_a Barium.

     _F_e Iron.

     _T_y_p_e Type of glass: (class attribute) 
           '1' building windows float processed 
            '2' building windows non float processed 
           '3' vehicle windows float processed 
           '4' vehicle windows non float processed (none in this
          database) 
           '5' containers 
           '6' tableware 
           '7' headlamps 

_S_o_u_r_c_e:

        *  Creator: B. German, Central Research Establishment, Home
           Office Forensic Science Service, Aldermaston, Reading,
           Berkshire RG7 4PN

        *  Donor: Vina Spiehler, Ph.D., DABFT, Diagnostic Products
           Corporation

_E_x_a_m_p_l_e_s:

     data(glass)
     str(glass)

