| vitcap2 | R Documentation |
The vitcap2 data frame has 84 rows and 3 columns.
Age and vital capacity for workers in the cadmium industry.
vitcap2
This data frame contains the following columns:
groupa numeric vector; group codes are 1: exposed > 10 years, 2: exposed < 10 years, 3: not exposed.
agea numeric vector, age in years.
vital.capacitya numeric vector, vital capacity (a measure of lung volume) (l).
P. Armitage and G. Berry (1987), Statistical Methods in Medical Research, 2nd ed., Blackwell, p.286.
plot(vital.capacity~age, pch=group, data=vitcap2)
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