maizeleafext

Data on leaf extension rate as a response to meristem temperature
in maize. The data are re-created liberally from 
Walls, W.R., 1971. Role of temperature in the regulation of leaf extension in Zea mays. Nature, 229: 46-47. 
The data points are not the same as in the original paper. Some additional
points were inserted to fill in the blanks and allow for reasonable
parameter estimates

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. Twenty eight (28) 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.c15> 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'.In addition, this release of the package provides functions for conducting simulations for 'nlme' and 'gnls' objects as well as bootstrapping. These functions are intended to work with the modeling framework of the 'nlme' package. It also provides four vignettes with extended examples.

Fernando Miguez

nlraa

Nonlinear Regression for Agricultural Applications

José Pinheiro

Douglas Bates

R-core 

maizeleafext function

A data frame with 10 rows and 2 columns<dl>
 <dt>temp</dt>
<dd>Meristem temperature (in Celsius).</dd> <dt>rate</dt>
<dd>Leaf extension rate (relative to 25 degrees).</dd>
</dl>

Format

Maize leaf extension rate as a response to temperature — maizeleafext

A data frame with 10 rows and 2 columns<dl>
 <dt>temp</dt>
<dd>Meristem temperature (in Celsius).</dd>

 <dt>rate</dt>
<dd>Leaf extension rate (relative to 25 degrees).</dd>


</dl>

maizeleafext: Maize leaf extension rate as a response to temperature

Description

Usage

Arguments

Format