TapeR: Flexible Tree Taper Curves Based on Semiparametric Mixed Models

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>.

Version:	0.5.3
Depends:	nlme, splines, pracma
Suggests:	testthat
Published:	2023-08-16
DOI:	10.32614/CRAN.package.TapeR
Author:	Edgar Kublin [aut], Johannes Breidenbach [ctb], Christian Vonderach [ctb, cre]
Maintainer:	Christian Vonderach <christian.vonderach at forst.bwl.de>
License:	GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation:	no
Citation:	TapeR citation info
Materials:	README, NEWS
CRAN checks:	TapeR results

Documentation:

Reference manual:	TapeR.html , TapeR.pdf
Vignettes:	TapeR: Flexible stem taper modelling (source, R code)

Downloads:

Package source:	TapeR_0.5.3.tar.gz
Windows binaries:	r-devel: TapeR_0.5.3.zip, r-release: TapeR_0.5.3.zip, r-oldrel: TapeR_0.5.3.zip
macOS binaries:	r-release (arm64): TapeR_0.5.3.tgz, r-oldrel (arm64): TapeR_0.5.3.tgz, r-release (x86_64): TapeR_0.5.3.tgz, r-oldrel (x86_64): TapeR_0.5.3.tgz
Old sources:	TapeR archive

Reverse dependencies:

Reverse imports:

TapeS

Linking:

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