R330 (version 1.0)

stamford.df: Maximum Daily Ozone Concertrations

Description

Daily maximum ozone concertrations at Stamford, Connecticut and Yonkers, New York, during the period 1 May 1974 to 30 September 1974.

Usage

data(stamford.df)

Format

A data frame with 136 observations on the following 2 variables:

days

denotes which day observation occured on

ozone

ozone in parts per billion

Source

Chambers, J. M. et al. Graphical Methods for Data Analysis. p346

References

Chambers, J. M. et al. (1983). Graphical Methods for Data Analysis. Duxbury Press: Boston.

Examples

data(stamford.df)
plot(stamford.df$days, stamford.df$ozone, xlab="Days", ylab="Ozone")
loess.stuff=loess(ozone~days, data=stamford.df, span=0.75)
lines(loess.stuff$x, loess.stuff$fitted)