equivalence (version 0.7.2)

pref.LAI: Measured Leaf Area Index data from PREF, northern Idaho, USA

Description

These data are the juxtaposition of model output and field measurements for 36 forest plots in the Priest River Experimental Forest in northern Idaho, USA. The model was based on the Beer-Lambert model (Duursma et al. 2003). The data were used to demonstrate a regression-based TOST in Robinson et al (2005).

Usage

data(pref.LAI)

Format

A dataset with 36 observations on 8 variables, the following two of which were used for the test of equivalence:

lai.pa

LAI as estimated using allometric functions applied to measurements of trees within the sample plot.

lai.bl

LAI as estimated using the Beer-Lambert model from measurements of interception using a hand-held ceptometer.

Source

The data are documented in Duursma et al. (2003) and Robinson et al (2005).

Details

Nothing in particular. PREF, and northern Idaho, are very attractive.

References

Duursma, R.A., J.D. Marshall, and A.P. Robinson. 2003. Leaf area index inferred from solar beam transmission in mixed conifer forests on complex terrain. Agricultural and Forest Meteorology 118, 221-236.

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.LAI)