

iowheat(Rnotes)                              R Documentation

_T_h_e _I_o_w_a _W_h_e_a_t _Y_i_e_l_d _D_a_t_a

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

     The data gives the pre-season and three growing months'
     precipitation, the mean temperatures for the three
     growing months and harvest month, the year, and the
     yield of wheat for the USA state of Iowa, for the years
     1930-1962.

_V_a_l_u_e_:

     The data frame has the following components:

    Year: Year of measurements

   Rain0: Pre-season rainfall

   Temp1: Mean temperature for first growing month

   Rain1: Rainfall for first growing month

   Temp2: Mean temperature for second growing month

   Rain2: Rainfall for first growing month

   Temp3: Mean temperature for third growing month

   Rain3: Rainfall for first growing month

   Temp4: Mean temperature for harvest month

   Yield: Yield of wheat in Iowa for given year

_C_A_T_E_G_O_R_Y_:

     Multiple regression; diagnostics.

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

     CAED Report, 1964.  Quoted in Draper  Smith.

