kergp (version 0.5.7)

covMan-class: Class "covMan"

Description

S4 class representing a covariance kernel defined manually by a (semi-)positive definite function.

Objects from the Class

Objects can be created by calling new("covMan", ...) or by using the covMan function.

Slots

kernel:

object of class "function" defining the kernel (supposed to be (semi-)positive definite).

hasGrad:

logical indicating whether kernel returns the gradient (w.r.t. the vector of parameters) as "gradient" attribute of the result.

acceptMatrix:

logical indicating whether kernel admits matrix arguments. Default is FALSE.

label:

object of class character, typically one or two words, used to describe the kernel.

d:

object of class "integer", the spatial dimension or number of inputs of the covariance.

inputNames:

object of class "character", vector of input names. Length d.

parLower:

,

parUpper:

object of class "numeric", vector of (possibly infinite) lower/upper bounds on parameters.

par:

object of class "numeric", numeric vector of parameter values.

parN:

object of class "integer", total number of parameters.

kernParNames:

object of class "character", name of the kernel parameters.

Methods

% \item{checkX}{\code{signature(object = "covMan", X = % "matrix")}: check the compatibility of a \code{covMan} object % and a design matrix. }

coef<-

signature(object = "covMan"): replace the whole vector of coefficients, as required during ML estimation.

coefLower<-

signature(object = "covMan"): replacement method for lower bounds on covMan coefficients.

coefLower

signature(object = "covMan"): extracts the numeric values of the lower bounds.

coef

signature(object = "covMan"): extracts the numeric values of the covariance parameters.

coefUpper<-

signature(object = "covMan"): replacement method for upper bounds on covMan coefficients.

coefUpper

signature(object = "covMan"): ...

covMat

signature(object = "covMan"): builds the covariance matrix or the cross covariance matrix between two sets of locations for a covMan object.

scores

signature(object = "covMan"): computes the scores (derivatives of the log-likelihood w.r.t. the covariance parameters.

show

signature(object = "covMan"): prints in a custom format.

% \item{kernelName}{\code{signature(object = "covMan")}: return the % character value of the kernel name.}

Author

Y. Deville, O. Roustant, D. Ginsbourger and N. Durrande.

See Also

The covMan function providing a creator.

Examples

showClass("covMan")