R: Spatial covariance - Derivatives

covVector.dx {DiceKriging} | R Documentation

## Spatial covariance - Derivatives

### Description

Computes the gradient of the covariance vector `c(x)` computed by `covMat1Mat2` with respect to `x`, for a given covariance structure.

### Usage

    covVector.dx(object, x, X, c)

### Arguments

`object` | an object specifying the covariance structure.
`x` | a vector representing the specific location.
`X` | a matrix whose columns represent locations.
`c` | a vector containing the covariances between the location `x` and the set of locations specified in `X` (see `covMat1Mat2`).

### Value

A vector of real numbers equal to the gradient of `c` as a function of `x`.

### Author(s)

Olivier Roustant, David Ginsbourger, Ecole des Mines de St-Etienne.

### See Also

`covMat1Mat2`

[Package DiceKriging version 1.5.5 Index]