salinity               package:SemiPar               R Documentation

_S_a_l_i_n_i_t_y _d_a_t_a

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

     The 'salinity' data frame has 28 observations on hydrological
     measurements from Pamlico Sound, North Carolina, USA.

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

     data(salinity)

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

     This data frame contains the following columns:

     _s_a_l_i_n_i_t_y salinity in Pamlico Sound.

     _l_a_g_g_e_d._s_a_l_i_n_i_t_y salinity in Pamlico Sound during the previous six
          weeks.

     _t_r_e_n_d trend=1 if the data is the first six-week period of the
          spring, and so forth.  Used to detect possible effects of the
          seasonal warming trend.

     _d_i_s_c_h_a_r_g_e discharge of fresh water from rivers into the sound.

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

     Ruppert, D, and Carroll, R.J. (1980), Trimmed least squares
     estimation in the linear model, _Journal of the American
     Statistical Association_, *75*,  828-838.

_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(salinity)
     pairs(salinity)

