TapeR: Flexible Tree Taper Curves Based on Semiparametric Mixed Models

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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 the following publication: Kublin, E., Breidenbach, J., Kaendler, G. (2013) A flexible stem taper and volume prediction method based on mixed-effects B-spline regression, Eur J For Res, 132:983-997.

Author
Edgar Kublin [aut], Johannes Breidenbach [ctb, cre]
Date of publication
2015-08-10 10:23:38
Maintainer
Johannes Breidenbach <job@nibio.no>
License
GPL (>= 2)
Version
0.3.3

View on CRAN

Man pages

DxHx.df
Example dataset of 10 trees with 10 diameter and height...
E_DHx_HmDm_HT.f
Calibrates a taper curve based on at least one diameter...
HT.par
Height tariff parameters for estimating tree heights of...
SK.par.lme
Taper model parameters for spruce in Germany based on BWI3...
TapeR_FIT_LME.f
Fits a taper curve model to the specified diameter-height...
TapeR-package
Flexible tree taper curves based on Semiparametric Mixed...
yx_ssp.f
Internal funtions not usually called by users.

Files in this package

TapeR
TapeR/inst
TapeR/inst/CITATION
TapeR/inst/doc
TapeR/inst/doc/TapeR.R
TapeR/inst/doc/TapeR.Rnw
TapeR/inst/doc/TapeR.pdf
TapeR/inst/CHANGES
TapeR/NAMESPACE
TapeR/data
TapeR/data/HT.par.rda
TapeR/data/SK.par.lme.rda
TapeR/data/DxHx.df.rda
TapeR/R
TapeR/R/y2x_ssp.f.R
TapeR/R/y2x_isp.f.R
TapeR/R/E_VOL_AB_HmDm_Ht.f.R
TapeR/R/yx_ssp.f.R
TapeR/R/E_DHx_HmDm_HT.f.R
TapeR/R/SK_VOLab_EBLUP_LME.f.R
TapeR/R/SK_EBLUP_LME.f.R
TapeR/R/Int_CdN_DHx_dHt.f.R
TapeR/R/EYx_ssp.f.R
TapeR/R/Hx_root.f.R
TapeR/R/E_HDx_HmDm_HT.f.R
TapeR/R/xy0_SK_EBLUP_LME.f.R
TapeR/R/TapeR_FIT_LME.f.R
TapeR/R/e_vol_ab_hmdm_ht.f_1.R
TapeR/R/BSplines.R
TapeR/R/qD.rout.f.R
TapeR/R/dN.f.R
TapeR/R/yx_isp.f.R
TapeR/R/xy0_root.f.R
TapeR/R/Int_E_VOL_AB_HmDm_HT_dHt.f.R
TapeR/R/XZ_BSPLINE.f.R
TapeR/R/CdN_DHxHt.f.R
TapeR/R/TransKnots.R
TapeR/R/E_DHx_HmDm_HT_CIdHt.f.R
TapeR/vignettes
TapeR/vignettes/TapeR.Rnw
TapeR/MD5
TapeR/build
TapeR/build/vignette.rds
TapeR/DESCRIPTION
TapeR/man
TapeR/man/TapeR-package.Rd
TapeR/man/DxHx.df.Rd
TapeR/man/yx_ssp.f.Rd
TapeR/man/E_DHx_HmDm_HT.f.Rd
TapeR/man/HT.par.Rd
TapeR/man/TapeR_FIT_LME.f.Rd
TapeR/man/SK.par.lme.Rd