nlraa: Nonlinear Regression for Agricultural Applications

Additional nonlinear regression functions using self-start (SS) algorithms. One of the functions is the Beta growth function proposed by Yin et al. (2003) <doi:10.1093/aob/mcg029>. There are several other functions with breakpoints (e.g. linear-plateau, plateau-linear, exponential-plateau, plateau-exponential, quadratic-plateau, plateau-quadratic and bilinear), a non-rectangular hyperbola and a bell-shaped curve. Eighteen new self-start (SS) functions in total. This package also supports the publication 'Nonlinear regression Models and applications in agricultural research' by Archontoulis and Miguez (2015) <doi:10.2134/agronj2012.0506>, a book chapter with similar material <doi:10.2134/appliedstatistics.2016.0003> and a publication by Oddi et. al. (2019) in Ecology and Evolution <doi:10.1002/ece3.5543>. The function 'nlsLMList' uses nlsLM for fitting, but it is otherwise almost identical to 'nlme::nlsList'. One of the main benefits is that these functions can be integrated in the modeling framework of the 'nlme' package. It also provides three vignettes with extended examples.

Version: 0.53
Depends: R (≥ 3.5.0)
Imports: knitr, nlme, stats
Suggests: bbmle, emmeans, ggplot2, HydroMe, lattice, minpack.lm, nlstools, nls2, segmented
Published: 2020-01-13
Author: Fernando Miguez ORCID iD [aut, cre], José Pinheiro [ctb, cph] (author of nlme::nlsList), Douglas Bates [ctb, cph] (author of nlme::nlsList), R-core [ctb, cph]
Maintainer: Fernando Miguez <femiguez at>
License: GPL-3
NeedsCompilation: no
Materials: README
CRAN checks: nlraa results


Reference manual: nlraa.pdf
Vignettes: Archontoulis and Miguez paper
Oddi etal - LFMC - paper
nlraa: An R package for Nonlinear Regression Applications in Agricultural Research
Package source: nlraa_0.53.tar.gz
Windows binaries: r-devel:, r-devel-gcc8:, r-release:, r-oldrel:
OS X binaries: r-release: nlraa_0.53.tgz, r-oldrel: nlraa_0.53.tgz


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