| danishlc | R Documentation |
The number of cases of lung cancer in four Danish cities
data(danishlc)
A data frame with 24 observations on the following 4 variables.
Casesthe number of lung cancer cases; a numeric vector
Popthe population of each age group in each city; a numeric vector
Agethe age group;
a factor with levels 40-54, 55-59,
60-64, 65-69, 70-74 and >74
Citythe city;
a factor with levels Fredericia, Horsens,
Kolding and Vejle
The data gives the number of cases of lung cancer in four Danish cities between 1968 and 1971 inclusive.
James K. Lindsey (1995) Modelling frequency and count data. Clarendon Press, page 157.
The original source is: E. B. Andersen (1977) Multiplicative Poisson models with unequal cell rates. Scandinavian Journal of Statistics, 4, 153–158.
data(danishlc) plot(Cases/Pop ~ City, data=danishlc)
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