# covVector.dx: 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`

.