A data frame with 154 observations on 6 variables. rlll{
[,1]
Ozone
numeric Ozone (ppb)
[,2]
Solar.R
numeric Solar R (lang)
[,3]
Wind
numeric Wind (mph)
[,4]
Temp
numeric Temperature (degrees F)
[,5]
Month
numeric Month (1--12)
[,6]
Day
numeric Day of month (1--31)
}