iowheat                package: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.

