A dataset containing growth data for sorghum and maize in Greece.

datasets

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.

Fernando Miguez

nlraa

Nonlinear Regression for Agricultural Applications

Jos<c3><a9> Pinheiro

Douglas Bates

R-core 

sm function

A data frame with 235 rows and 5 columns<dl class="dl-horizontal">
 <dt>DOY</dt><dd>-integer- Day of the year 141-303</dd>
 <dt>Block</dt><dd>-integer- Block in the experimental design 1-4</dd>
 <dt>Input</dt><dd>-integer- Input level 1 (Low) or High (2)</dd>
 <dt>Crop</dt><dd>-factor- either F (Fiber Sorghum), M (Maize), S (Sweet Sorghum)</dd>
 <dt>Yield</dt><dd>-numeric- Biomass yield in Mg/ha</dd>
</dl>

Format

Sorghum and Maize growth in Greece — sm

A data frame with 235 rows and 5 columns<dl class='dl-horizontal'>
 <dt>DOY</dt><dd>-integer- Day of the year 141-303</dd>
 <dt>Block</dt><dd>-integer- Block in the experimental design 1-4</dd>
 <dt>Input</dt><dd>-integer- Input level 1 (Low) or High (2)</dd>
 <dt>Crop</dt><dd>-factor- either F (Fiber Sorghum), M (Maize), S (Sweet Sorghum)</dd>
 <dt>Yield</dt><dd>-numeric- Biomass yield in Mg/ha</dd>
</dl>

sm: Sorghum and Maize growth in Greece

Description

Usage

Arguments

Format

Details