vitcap {ISwR}R Documentation

Vital capacity

Description

The vitcap data frame has 24 rows and 3 columns. It contains data on vital capacity for workers in the cadmium industry. It is a subset of the vitcap2 data set.

Format

This data frame contains the following columns:

group
a numeric vector. Group codes are 1: 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) in liters.

Source

P. Armitage and G. Berry (1987), Statistical Methods in Medical Research, 2nd ed., Blackwell, p.~286.

Examples

data(vitcap)
plot(vital.capacity~age, pch=group, data=vitcap)

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