| pref.4PG {equivalence} | R Documentation |
Measured and simulated data from PREF, northern Idaho, USA, and 4-PG
Description
These data are the juxtaposition of model output and field measurements for the Priest River Experimental Forest in northern Idaho, USA. The model was a process-based aspatial forest stand model called 4-PG, developed from 3-PG by Duursma (2004). The data were used to demonstrate a regression-based TOST in Robinson et al (2005).
Usage
data(pref.4PG)Format
A dataset with 35 observations on 33 variables, of which the following two were used for the model validation exercise.
- stemvolinc
measured decadal stem growth in $m^3/ha$
- volinc4PG
predicted decadal stem growth in $m^3/ha$
Details
Nothing in particular. Devil's club (Oplopanax horridus) is very painful.
Source
The data are documented in Duursma (2004) and Robinson et al (2005).
References
Duursma, R.A. 2004. A simple process-based model of forest growth, and a test for the Priest River Experimental Forest. Ph.D. Thesis, University of Idaho, 169 p.
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
Examples
data(pref.4PG)