GRAlogis2k: the GRAlogis2k set 'GRAlogis2k' - A family of 2 parameter...

In MarcoDVisser/FDPtools: Optimized tools for working with forest dynamics plot data

Description

the GRAlogis2k set

GRAlogis2k - A family of 2 parameter logistic functions for gradient modelling. These models are usually used to predict frequency, a probabily or fractions over x (distance, time, concentration). The 2k version is bound 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.

Usage

GRAlogis2k(x, beta0, beta1, beta3, betas = NULL)

GRAilogis2k(y, beta0, beta1)

GRAdlogis2k(M, r)

Arguments

x	the gradient (size, time, concentration)
beta0	intercept
beta1	rate of increase
betas	vector to input all parameters in one go
y	prediction, used in the inverse form

Author(s)

Marco D. Visser

Marco D. Visser

Marco D. Visser

MarcoDVisser/FDPtools documentation built on May 7, 2019, 2:49 p.m.