Description Usage Arguments Author(s)
View source: R/EcologyModels.R
the GRAlogis3k set
GRAlogis3k
- A family of 3 parameter logistic functions for
gradient modelling. These models are usually used to predict frequency,
a probabily or fractions over x (distance, time, concentration) though
though they are not limited to the range [0,1].
The set includes an inverse and differential, which
give the inverse estimate (x at a given y) or
dy/dx rates over x.
1 2 3 4 5 | GRAlogis3k(x, beta0, beta1, beta3, betas = NULL)
GRAilogis3k(M, M0, r)
GRAdlogis3k(M, r)
|
x |
the gradient (size, time, concentration) |
beta0 |
intercept |
beta1 |
rate of increase |
beta3 |
Asymtotic rate |
betas |
vector to input all parameters in one go |
y |
prediction, used in the inverse form |
Marco D. Visser
Marco D. Visser
Marco D. Visser
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