format
rl{
1 Month: 1 = January, ..., 12 = December
2 Day of month
3 Day of week: 1 = Monday, ..., 7 = Sunday
4 Daily maximum one-hour-average ozone reading
5 500 millibar pressure height (m) measured at Vandenberg AFB
6 Wind speed (mph) at Los Angeles International Airport (LAX)
7 Humidity (%) at LAX
8 Temperature (degrees F) measured at Sandburg, CA
9 Temperature (degrees F) measured at El Monte, CA
10 Inversion base height (feet) at LAX
11 Pressure gradient (mm Hg) from LAX to Daggett, CA
12 Inversion base temperature (degrees F) at LAX
13 Visibility (miles) measured at LAX
}source
Leo Breiman, Department of Statistics, UC Berkeley. Data used in
Leo Breiman and Jerome H. Friedman (1985), Estimating optimal
transformations for multiple regression and correlation, JASA, 80, pp.
580-598.