Sitka

The <code>Sitka</code> data frame has 395 rows and 4 columns. It gives repeated
 measurements on the log-size of 79 Sitka spruce trees, 54 of which
 were grown in ozone-enriched chambers and 25 were controls. The size
 was measured five times in 1988, at roughly monthly intervals.

datasets

Functions and datasets to support Venables and Ripley,
"Modern Applied Statistics with S" (4th edition, 2002).

Brian Ripley

MASS

Support Functions and Datasets for Venables and Ripley's MASS

Bill Venables

Kurt Hornik

Albrecht Gebhardt

David Firth

Sitka function

This data frame contains the following columns:<dl>
 <dt><code>size</code></dt>
<dd>measured size (height times diameter squared) of
 tree, on log scale.</dd> <dt><code>Time</code></dt>
<dd>time of measurement in days since 1 January 1988.</dd> <dt><code>tree</code></dt>
<dd>number of tree.</dd> <dt><code>treat</code></dt>
<dd>either <code>"ozone"</code> for an ozone-enriched
 chamber or <code>"control"</code>.</dd> 
</dl>

Format

Growth Curves for Sitka Spruce Trees in 1988 — Sitka

This data frame contains the following columns:<dl>
 <dt><code>size</code></dt>
<dd>measured size (height times diameter squared) of
 tree, on log scale.</dd>

 <dt><code>Time</code></dt>
<dd>time of measurement in days since 1 January 1988.</dd>

 <dt><code>tree</code></dt>
<dd>number of tree.</dd>

 <dt><code>treat</code></dt>
<dd>either <code>"ozone"</code> for an ozone-enriched
 chamber or <code>"control"</code>.</dd>

 
</dl>

Sitka: Growth Curves for Sitka Spruce Trees in 1988

Description

Usage

Arguments

Format

References

See Also