Description Usage Format Source References Examples
The ragweed
data frame has data on ragweed levels and meteorological variables for 334 days in Kalamazoo, Michigan, U.S.A.
1 |
This data frame contains the following columns:
pollenCount
ragweed pollen count (grains per cubic metre).
year
one of 1991, 1992, 1993 or 1994.
dayInSeason
day number in the current ragweed pollen season.
temperature
temperature for the corresponding day (degrees Fahrenheit).
temperatureResidual
residual from fitting a 5 effective degrees of freedom smoothing splines to temperature versus day number for each annual ragweed pollen season (degrees Fahrenheit).
rain
indicator of significant rain on the corresponding day:
1=at least 3 hours of steady or brief but intense rain,
0=otherwise.
windSpeed
wind speed for the corresponding day (knots).
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.
Ruppert, D., Wand, M.P. and Carroll, R.J. (2003). Semiparametric Regression Cambridge University Press.
1 2 |
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.