The data are a subsample of 500 observations from a data set that originates in a study where air pollution at a road is related to traffic volume and meteorological variables, collected by the Norwegian Public Roads Administration. The response variable consists of hourly values of the logarithm of the concentration of PM10 (particles), measured at Alnabru in Oslo, Norway, between October 2001 and August 2003. (Source: Statlib)
Usage
data(PM10)
Arguments
Format
A data frame with 500 observations on the following 8 variables.
PM10
Hourly values of the logarithm of the concentration of PM10 (particles)
cars
The logarithm of the number of cars per hour
temp
Temperature 2 meters above ground (degree C)
wind.speed
Wind speed (meters/second)
temp.diff
The temperature difference between 25 and 2 meters above ground (degree C)
Aldrin, M. (2006) Improved predictions penalizing both slope and curvature in additive models, Computational Statistics & Data Analysis, 50, pp 267--284