DxHx.df

Example dataset of 10 trees with 10 diameter and height measurements
 for each tree.

datasets

Implementation of functions for fitting taper curves (a semiparametric
linear mixed effects taper model) to diameter measurements along stems. Further
functions are provided to estimate the uncertainty around the predicted curves,
to calculate timber volume (also by sections) and marginal (e.g., upper) diameters.
For cases where tree heights are not measured, methods for estimating
additional variance in volume predictions resulting from uncertainties in
tree height models (tariffs) are provided. The example data include the taper
curve parameters for Norway spruce used in the 3rd German NFI fitted to 380 trees
and a subset of section-wise diameter measurements of these trees. The functions
implemented here are detailed in Kublin, E., Breidenbach, J., Kaendler, G. (2013)
<doi:10.1007/s10342-013-0715-0>.

Christian Vonderach

TapeR

Flexible Tree Taper Curves Based on Semiparametric Mixed Models

Edgar Kublin

Johannes Breidenbach

DxHx.df function

A data frame with 172 observations on the following 4 variables.<dl>
 <dt><code>Id</code></dt>
<dd>Numeric vector of tree IDs.</dd> <dt><code>Dx</code></dt>
<dd>Numeric vector of diameter measurements.</dd> <dt><code>Hx</code></dt>
<dd>Numeric vector of height measurements.</dd> <dt><code>Ht</code></dt>
<dd>Numeric vector of tree height (repeated for each
	 measurement in each tree).</dd> 
</dl>

Format


  Example dataset of 10 trees with 10 diameter and height measurements
  for each tree. — DxHx.df

A data frame with 172 observations on the following 4 variables.<dl>
 <dt><code>Id</code></dt>
<dd>Numeric vector of tree IDs.</dd>

 <dt><code>Dx</code></dt>
<dd>Numeric vector of diameter measurements.</dd>

 <dt><code>Hx</code></dt>
<dd>Numeric vector of height measurements.</dd>

 <dt><code>Ht</code></dt>
<dd>Numeric vector of tree height (repeated for each
	 measurement in each tree).</dd>

 
</dl>

DxHx.df: Example dataset of 10 trees with 10 diameter and height measurements for each tree.

Description

Usage

Arguments

Format

Details

References

Examples