This is the ozone data used in Breiman and Friedman (1985). This dataset contains 330 observations,
and each observation is a daily measurement.
Usage
data(ozone)
Format
ozone
Ozone reading
temp
Temperature (degree C). minimum 25 and maximum 93 in original scale.
invHt
Inversion base height (feet). minimum 111 and maximum 5000 in original scale.
press
Pressure gradient (mm Hg). minimum -69 and maximum 107 in original scale.
vis
Visibility (miles). minimum 0 and maximum 350 in original scale.
milPress
500 millibar pressure height (m). minimum 5320 and maximum 5950 in original scale.
hum
Humidity (percent). minimum 19 and maximum 93.
invTemp
Inversion base temperature (degrees F). minimum -25 and maximum 332 in original scale.
wind
Wind speed (mph). minimum 0 and maximum 21 in original scale.
Details
All the variables, except for the response, have been sacled to [0,1] interval. To transform
back to the original scale, use the formula:
x=min+(max-min)*z.
Source
Breiman, L. and Friedman, J. (1985), "Estimating Optimal Transformations for Multiple Regression
and Correlation", Journal of the American Statistical Association, 80, 580–598.