Sitka                  package:MASS                  R Documentation

_G_r_o_w_t_h _C_u_r_v_e_s _f_o_r _S_i_t_k_a _S_p_r_u_c_e _T_r_e_e_s _i_n _1_9_8_8

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

     The `Sitka' data frame has 395 rows and 4 columns.  It gives
     repeated measurements on the log-size of 79 Sitka spruce trees, 54
     of which were grown in ozone-enriched chambers and 25 were
     controls.  The size was measured five times in 1988, at roughly
     monthly intervals.

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

    size: measured size (height times diameter squared) of tree, on log
          scale. 

    Time: time of measurement in  days since 1 January 1988 

    tree: number of tree 

   treat: either `"ozone"' for an ozone-enriched chamber or `"control"' 

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

     This data frame contains the following columns:

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

     P. J. Diggle, K.-Y. Liang and S. L. Zeger (1994) Analysis of
     Longitudinal Data. Clarendon Press, Oxford

_S_e_e _A_l_s_o:

     `Sitka89'

