Sitka89

0th

Percentile

The Sitka89 data frame has 632 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 eight times in 1989, at roughly monthly intervals.

Keywords
datasets
Usage
Sitka89
Format

This data frame contains the following columns:

size
measured size (height times diameter squared) of tree, on log scale.
Time
time of measurement in days since 1 January 1988.
tree
number of tree.
treat
either "ozone" for an ozone-enriched chamber or "control".

See Also

Sitka

Aliases
  • Sitka89
Documentation reproduced from package MASS, version 7.3-47, License: GPL-2 | GPL-3

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