EnvStats (version 2.7.0)

Environmental: Atmospheric Environmental Conditions in New York City

Description

Daily measurements of ozone concentration, wind speed, temperature, and solar radiation in New York City for 153 consecutive days between May 1 and September 30, 1973.

Usage

Environmental.df
  Air.df

Format

The data frame Environmental.df has 153 observations on the following 4 variables.

ozone

Average ozone concentration (of hourly measurements) of in parts per billion.

radiation

Solar radiation (from 08:00 to 12:00) in langleys.

temperature

Maximum daily temperature in degrees Fahrenheit.

wind

Average wind speed (at 07:00 and 10:00) in miles per hour.

Row names are the dates the data were collected.

The data frame Air.df is the same as Environmental.df except that the column ozone is the cube root of average ozone concentration.

Details

Data on ozone (ppb), solar radiation (langleys), temperature (degrees Fahrenheit), and wind speed (mph) for 153 consecutive days between May 1 and September 30, 1973. These data are a superset of the data contained in the data frame environmental in the package lattice.

References

Chambers, J.M., W.S. Cleveland, B. Kleiner, and P.A. Tukey. (1983). Graphical Methods for Data Analysis. Duxbury Press, Boston, MA, 395pp.

Cleveland, W.S. (1993). Visualizing Data. Hobart Press, Summit, New Jersey, 360pp.

Cleveland, W.S. (1994). The Elements of Graphing Data. Revised Edition. Hobart Press, Summit, New Jersey, 297pp.

Examples

# Scatterplot matrix
pairs(Environmental.df)

pairs(Air.df)


# Time series plot for ozone
attach(Environmental.df)
dates <- as.Date(row.names(Environmental.df), format = "%m/%d/%Y")
plot(dates, ozone, type = "l", 
    xlab = "Time (Year = 1973)", ylab = "Ozone (ppb)",
    main = "Time Series Plot of Daily Ozone Measures")
detach("Environmental.df")
rm(dates)