individ: Split individuals

In nlr: Nonlinear Regression Modelling using Robust Methods

Description

Hessian of a function is symetric matrix, individ function constract lower diagonal parts and store them in collumns of a matrix. Thus the only unique hessians will be given.

Usage

individ(hessian)

Arguments

hessian

Three dimentional n \times p \times p array of hessian.

Details

It is used in curvature function to compute the curvatures.

Value

n \times (p*p+1) matrix of hessian values, constracted from the lower triangular of hessian.

Note

It is created for internal use in curvature function, it ight not be called by user explicitly.

Author(s)

Hossein Riazoshams, May 2014. Email: [e-mail] URL http://www.riazoshams.com/nlr/

References

Bates, D.M., and Watts, D. G. (1980). Relative curvature measures of nonlinearity, J. R. statistic. Ser. B 42: 1-25.

See Also

curvature

Examples

## The function is currently defined as
"individ"

nlr documentation built on July 31, 2019, 5:09 p.m.