ragweed               package:SemiPar               R Documentation

_R_a_g_w_e_e_d _d_a_t_a

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

     The 'ragweed' data frame has data on ragweed levels and
     meteorological variables for 335 days in Kalamazoo, Michigan,
     U.S.A.

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

     data(ragweed)

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

     This data frame contains the following columns:

     _r_a_g_w_e_e_d ragweed level (grains per cubic metre).

     _y_e_a_r one of 1991, 1992, 1993 or 1994.

     _d_a_y._i_n._s_e_a_s day number in the current ragweed pollen season.

     _t_e_m_p_e_r_a_t_u_r_e temperature of following day (degrees Fahrenheit).

     _r_a_i_n indicator of significant rain the following day: 1=at least 3
          hours of steady or brief but intense rain, 0=otherwise.

     _w_i_n_d._s_p_e_e_d wind speed forecast for following day (knots).

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

     Stark, P. C., Ryan, L. M., McDonald, J. L. and Burge, H. A.
     (1997). Using meteorologic data to model and predict daily ragweed
     pollen levels. _Aerobiologia_, *13*, 177-184.

_R_e_f_e_r_e_n_c_e_s:

     Ruppert, D., Wand, M.P. and Carroll, R.J. (2003)
      _Semiparametric Regression_ Cambridge University Press.
      <URL: http://stat.tamu.edu/~carroll/semiregbook/>

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

     library(SemiPar)
     data(ragweed)
     pairs(ragweed,pch=".")

