calif.air.poll data frame has 345 sets
of observations ozone level and meteorological variables
in Upland, California, U.S.A., in 1976.
This data frame contains the following columns:
Ozone concentration (ppm) at Sandburg Air Force Base.
Pressure gradient at Daggett, California.
Inversion base height, feet.
Inversion base temperature, degrees Fahrenheit.
Brieman, L. and Friedman, J. (1985). Estimating optimal transformations for multiple regression and correlation (with discussion). Journal of the American Statistical Association, 80, 580–619.
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