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:
group
a numeric vector; group codes are 1: exposed > 10 years, 2: exposed < 10 years, 3: not exposed.
age
a numeric vector, age in years.
vital.capacity
a 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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