nlr (version 0.1-3)

nlrobjvarmdls1: Variance model objects.

Description

List of nl.form objects of pre defined variance models. They use in heteroscedastic variance cases.

• nlrobjvarmdls1 has 7 nonlinear variance model function, with \(\sigma^2\) as variance.

• nlrobjvarmdls1 has 7 nonlinear variance model function exactly same as nlrobjvarmdls1 but the \(\sigma\) as variance. In fact it can be standard deviation, square roots. But nlr work with variance functions.

• nlrobjvarmdls1 has 3 nonlinear variance model function, in general case they dont include constant variance \(\sigma\). Variance is general parameteric form \(Var(error)=H(x,\tau)\)

Usage

data(nlrobjvarmdls1) 
  
  #nlrobjvarmdls1[[1]] access first element.

Format

The format is: chr "nlrobjvarmdls1"

Elements are list of model, each cell is nl.form object.

Details

by index can access any of the nodels, for example nlrobj1[[14]] with name nlrobjvarmdls1[[1]]$name="power" is power model used to fitt the chicken Weights data.

References

Robust Nonlinear Regression, Theories and Methods with Practical Guides for R Packages. Riazoshams et al.

See Also

nl.form, Weights

Examples

# NOT RUN {
data(nlrobjvarmdls1)
nlrobjvarmdls1
# }