urchin.growth {UsingR} | R Documentation

## Data on growth of sea urchins

### Description

Data on growth of sea urchins.

### Usage

    data(urchin.growth)

### Format

A data frame with 250 observations on the following 2 variables.

age
  Estimated age of sea urchin
size
  Measurement of size

### Details

Data is sampled from a data set that accompanies the thesis of P. Grosjean.

### Source

Thesis was found at http://www.sciviews.org/_pgrosjean.

### Examples

    data(urchin.growth)
    plot(jitter(size) ~ jitter(age), data=urchin.growth)

[Package UsingR version 0.1-4 Index]