R: Vital capacity

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.

### Usage

    vitcap

### 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

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

[Package ISwR version 2.0-7 Index]