rock-MASS                package:MASS                R Documentation

_M_e_a_s_u_r_e_m_e_n_t_s _o_n _P_e_t_r_o_l_e_u_m _R_o_c_k _S_a_m_p_l_e_s

_D_e_s_c_r_i_p_t_i_o_n:

     Twelve core samples from petroleum reservoirs were sampled by 4
     cross-sections.  Each core sample was measured for permeability,
     and each cross-section has total area of pores, total perimeter of
     pores, and shape.

_U_s_a_g_e:

     data(rock)

_F_o_r_m_a_t:

     A data frame with 48 rows and 4 numeric columns.

       'area'   area of pores space, in pixels out of 256 by 256
       'peri'   perimeter in pixels
       'shape'  perimeter/sqrt(area)
       'perm'   permeability in milli-Darcies

_S_o_u_r_c_e:

     Data from BP Research, image analysis by Ronit Katz, U. Oxford.

     Katz, R. (1995) _Spatial Analysis of Pore Images_. D.Phil. thesis,
     Department of Statistics, University of Oxford.

_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.

