Sitka

0th

Percentile

Growth Curves for Sitka Spruce Trees in 1988

The Sitka 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.

Keywords
datasets
Usage
Sitka
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".

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

See Also

Sitka89.

Aliases
  • Sitka
Documentation reproduced from package MASS, version 7.3-51.3, License: GPL-2 | GPL-3

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