

Sitka89(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_9

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

     The `Sitka89' data frame has 632 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 eight times in 1989, at roughly monthly inter-
     vals.

_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) Analy-
     sis of Longitudinal Data.  Clarendon Press, Oxford

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

     `Sitka'

