airmay              package:robustbase              R Documentation

_A_i_r _Q_u_a_l_i_t_y _D_a_t_a

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

     Air Quality Data Set for May 1973, from Chambers et al. (1983).
     The whole data set consists of daily readings of air quality
     values from May 1, 1973 to September 30, 1973, but here are
     included only the values for May. This data set is an example of
     the special treatment of the missing values.

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

     data(airmay)

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

     A data frame with 31 observations on the following 4 variables.

     '_X_1' Solar Radiation in Longleys in the frequency band 4000-7700
          from 0800 to 1200 hours at Central Park

     '_X_2' Average windspeed (in miles per hour) between 7000 and 1000
          hours at La Guardia Airport

     '_X_3' Maximum daily temperature (in degrees Fahrenheit) at La
          Guardia Airport

     '_Y' Mean ozone concentration (in parts per billion) from 1300 to
          1500 hours at Roosevelt Island

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

     P. J. Rousseeuw and A. M. Leroy (1987) _Robust Regression and
     Outlier Detection_; Wiley, p.86, table 6.

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

     data(airmay)
     summary(lm.airmay <- lm(Y ~ ., data=airmay))

     airmay.x <- data.matrix(airmay[,1:3])

