plants {rconifers}R Documentation

Simple plant data set for the CONIFERS growth model

Description

This a simple plants data.frame that contains basic plant attributes used in the CONIFERS growth model.

The plants data.frame has 60 rows and 9 columns.

Usage

data(plants)

Format

This data.frame contains the following columns:

plot
The plot identifier.
sp.code
species code (See swo or smc)
d6
Diameter at 6 inches above soil interface.
dbh
Diameter at breast height, in inches.
tht
Total height of the stem, in feet.
cr
Crown ratio (0 to 1).
n.stems
Number of stems this record represents.
expf
Expansion factor (weight) the tree record represents, in stems per acre.
crown.width
Width of the crown at the widest point, in feet.

Details

The example data represents a field sample that can be used to generate future forest conditions using the CONIFERS forest growth model. The data are in imperial units. The required values are the plot, sp.code, and d6 measurements. Values that have not been observed, or are missing, are denoted with an NA and can be imputed using the impute function.

Author(s)

Jeff D. Hamann jeff.hamann@forestinformatics.com,
Martin W. Ritchie mritchie@fs.fed.us

References

Ritchie, M.W. 2008. User's Guide and Help System for CONIFERS: A Simulator for Young Conifer Plantations Version 4.10. See http://www.fs.fed.us/psw/programs/ecology_of_western_forests/projects/conifers/

See Also

calc.max.sdi, impute, plants, plots project, rand.seed, rconifers, sample.data, set.species.map, set.variant, smc, summary.sample.data, swo, thin

Examples

library( rconifers )
data(plants)
print( plants )

[Package rconifers version 0.0-9 Index]