weightgain {HSAUR} | R Documentation

## Gain in Weight of Rats

### Description

The data arise from an experiment to study the gain in weight of rats fed on four different diets, distinguished by amount of protein (low and high) and by source of protein (beef and cereal).

### Usage

    data("weightgain")

### Format

A data frame with 40 observations on the following 3 variables.

`source`
  source of protein given, a factor with levels `Beef` and `Cereal`.
`type`
  amount of protein given, a factor with levels `High` and `Low`.
`weightgain`
  weigt gain in grams.

### Details

Ten rats are randomized to each of the four treatments. The question of interest is how diet affects weight gain.

### Source

D. J. Hand, F. Daly, A. D. Lunn, K. J. McConway and E. Ostrowski (1994). A Handbook of Small Datasets, Chapman and Hall/CRC, London.

### Examples

      data("weightgain", package = "HSAUR")
      interaction.plot(weightgain$type, weightgain$source,
                       weightgain$weightgain)

[Package HSAUR version 1.0-1 Index]