# logLikGrad

From DiceKriging v1.5.6
by Olivier Roustant

##### Concentrated log-Likelihood of a km object - Analytical gradient

Returns the exact gradient vector of the concentrated log-likelihood.

##### Usage

`logLikGrad(param, model, envir)`

##### Arguments

- param
a vector containing the optimization variables.

- model
an object of class

`km`

.- envir
an environment specifying where to get intermediate values calculated in

`logLikFun`

.

##### Value

the gradient of the concentrated log-likelihood.

##### References

J.-S. Park and J. Baek (2001), Efficient computation of maximum likelihood estimators in a spatial linear model with power exponential covariogram, *Computer Geosciences*, **27** no. 1, 1-7.

##### See Also

*Documentation reproduced from package DiceKriging, version 1.5.6, License: GPL-2 | GPL-3*

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