Some useful equations for nonlinear regression in R

Published at January 8, 2019 ·  21 min read

Introduction Very rarely, biological processes follow linear trends. Just think about how a crop grows, or responds to increasing doses of fertilisers/xenobiotics. Or think about how an herbicide degrades in the soil, or about the germination pattern of a seed population. It is very easy to realise that curvilinear trends are far more common than linear trends. Furthermore, asymptotes and/or inflection points are very common in nature. We can be sure: linear equations in biology are just a way to approximate a response over a very narrow range for the independent variable....