ufc: Upper Flat Creek cruise data

In equivalence: Provides Tests and Graphics for Assessing Tests of Equivalence

Description

These are forest measurement data from the Upper Flat Creek unit of the University of Idaho Experimental Forest, measured in 1991. The inventory was based on variable radius plots with 6.43 sq. m. per ha. BAF (Basal Area Factor). The forest stand was 121.5 ha.

Usage

data(ufc)

Format

A data frame with 633 observations on the following 12 variables.

Plot

plot label

Tree

tree label

Species

species kbd

Dbh

tree diameter at 1.37 m. from the ground, measured in millimetres.

Height

tree height measured in decimetres

Height.ft

tree height converted to feet

Dbh.in

tree diameter converted to inches

Height.ft.p

predicted tree height in feet

Height.m

tree height in metres

Height.m.p

predicted tree height in metres

Details

Plots that were measured with no trees are signified in the dataset by lines that have blank species codes and missing DBH.

Source

The data are provided courtesy of Harold Osborne and Ross Appelgren of the University of Idaho Experimental Forest. The predicted height comes from the height/diameter model documented in Wykoff et al. (1982). The data and model were used in Robinson et al. (2005).

References

Robinson, A.P., R.A. Duursma, and J.D. Marshall. 2005. A regression-based equivalence test for model validation: shifting the burden of proof. Tree Physiology 25, 903-913.

Wykoff,W.R., N.L. Crookston, and A.R. Stage. 1982. User's guide to the stand Prognosis model. GTR-INT 133, USDA Forest Service, Intermountain Research Station, Ogden, UT, 113 p.

Examples

data(ufc)

Example output

Loading required package: lattice
Loading required package: boot

Attaching package: 'boot'

The following object is masked from 'package:lattice':

    melanoma

Loading required package: PairedData
Loading required package: MASS
Loading required package: gld
Loading required package: mvtnorm
Loading required package: ggplot2

Attaching package: 'PairedData'

The following object is masked from 'package:base':

    summary

equivalence documentation built on May 1, 2019, 9:15 p.m.