| ragweed {SemiPar} | R Documentation |
Ragweed data
Description
The ragweed data frame has data on ragweed levels
and meteorological variables for 335 days in Kalamazoo,
Michigan, U.S.A.
Usage
data(ragweed)Format
This data frame contains the following columns:
- ragweed
ragweed level (grains per cubic metre).
- year
one of 1991, 1992, 1993 or 1994.
- day.in.seas
day number in the current ragweed pollen season.
- temperature
temperature of following day (degrees Fahrenheit).
- rain
indicator of significant rain the following day: 1=at least 3 hours of steady or brief but intense rain, 0=otherwise.
- wind.speed
wind speed forecast for following day (knots).
Source
Stark, P. C., Ryan, L. M., McDonald, J. L. and Burge, H. A. (1997). Using meteorologic data to model and predict daily ragweed pollen levels. Aerobiologia, 13, 177-184.
References
Ruppert, D., Wand, M.P. and Carroll, R.J. (2003)
Semiparametric Regression Cambridge University Press.
http://stat.tamu.edu/~carroll/semiregbook/
Examples
library(SemiPar)
data(ragweed)
pairs(ragweed,pch=".")