ozone                  package:Rlab                  R Documentation

_M_o_n_t_h_l_y _m_e_a_n _c_o_n_c_e_n_t_r_a_t_i_o_n_s _o_f _o_z_o_n_e.

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

     The ozone data frame has 552 rows and 3 columns. The first column
     is the mean monthly ozone concentration in Dobson units of the
     ozone layer at Arosa, Switzerland, from 1926 to 1971.

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

     A data frame with 518 observations on the following 3 variables.

     _o_z_o_n_e : mean monthly ozone in Dobson units

     _y_e_a_r : year in which measurements were taken (4 digits)

     _m_o_n_t_h : month in which measurements were taken (3 letter
          abbreviation)

