![]() Of course, I should not forget that we are interested in those equations because we want to fit them! Therefore, I will also give the corresponding R functions, at least, I will give the ones I use most often. I thought that it might be useful to list the most widespread equations, together with their main properties and the biological meaning of their parameters. Therefore, we need an S-shaped function to fit to our data, but … how do we select the right equation? ![]() For example, we could have observed that the response of a plant species to the dose of some toxic substance is S-shaped. I.e., we look at biological processes, plot the data and note that they follow a certain pattern. What should we do when we have no literature information? We are not mathematicians and our approach to model building is often emipirical. ![]() Selecting the best equation to fit to our experimental data may require some experience. ![]()
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