link: Link Functions for Aster Models

Description Usage Arguments Value Note See Also Examples

Description

Calculate link function and up to one derivative for families known to the package.

Usage

1
link(xi, fam, deriv = 0, delta)

Arguments

xi

mean value parameter value, a numeric vector.

fam

an object of class "astfam" produced by one of the family functions (see families) specifying the exponential family.

deriv

the number of derivatives wanted. Must be either zero or one.

delta

direction in which limit is taken. Link function is for family that is limit of family specified, limit being for distributions with canonical parameter theta + s delta, the limit being as s to infinity. May be missing, in which case delta = 0 is assumed, which is the same as no limit being taken.

Value

a list containing some of the following components:

zeroth

the value of the link function at xi, a vector of dimension d, where d

is the dimension of xi.

first

the value of the first derivative at xi, a d by d matrix, where d is the dimension of xi or a scalar if xi is scalar.

Note

Not intended for use by ordinary users. Provides R interface for testing to C code called by many other functions in the package.

See Also

families and cumulant

Examples

1
2
link(0.3, fam.bernoulli(), deriv = 1)
link(0.3, fam.bernoulli(), deriv = 1, delta = 1)

aster2 documentation built on May 2, 2019, 11:02 a.m.