mtcars               package:datasets               R Documentation

_M_o_t_o_r _T_r_e_n_d _C_a_r _R_o_a_d _T_e_s_t_s

_D_e_s_c_r_i_p_t_i_o_n:

     The data was extracted from the 1974 _Motor Trend_ US magazine,
     and comprises fuel consumption and 10 aspects of automobile design
     and performance for 32 automobiles (1973-74 models).

_U_s_a_g_e:

     mtcars

_F_o_r_m_a_t:

     A data frame with 32 observations on 11 variables.

       [, 1]  mpg   Miles/(US) gallon
       [, 2]  cyl   Number of cylinders
       [, 3]  disp  Displacement (cu.in.)
       [, 4]  hp    Gross horsepower
       [, 5]  drat  Rear axle ratio
       [, 6]  wt    Weight (lb/1000)
       [, 7]  qsec  1/4 mile time
       [, 8]  vs    V/S
       [, 9]  am    Transmission (0 = automatic, 1 = manual)
       [,10]  gear  Number of forward gears
       [,11]  carb  Number of carburetors

_S_o_u_r_c_e:

     Henderson and Velleman (1981), Building multiple regression models
     interactively. _Biometrics_, *37*, 391-411.

_E_x_a_m_p_l_e_s:

     require(graphics)
     pairs(mtcars, main = "mtcars data")
     coplot(mpg ~ disp | as.factor(cyl), data = mtcars,
            panel = panel.smooth, rows = 1)