ragweed data frame has data on ragweed levels
and meteorological variables for 335 days in Kalamazoo,
This data frame contains the following columns:
ragweed level (grains per cubic metre).
one of 1991, 1992, 1993 or 1994.
day number in the current ragweed pollen season.
temperature of following day (degrees Fahrenheit).
indicator of significant rain the following day: 1=at least 3 hours of steady or brief but intense rain, 0=otherwise.
wind speed forecast for following 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.
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