# Definition of nested experimental design sets for Multi-Fidelity Cokriging models

### Description

Build an object of class S3 (`"NestDesign"`

) defining nested experimental design sets used to build multi-fidelity Cokriging models.

### Usage

1 | ```
NestedDesign(x, nlevel , indices = NULL, n = NULL)
``` |

### Arguments

`x` |
a matrix representing the experimental design set of the code level |

`nlevel ` |
an integer representing the number of code levels. |

`indices` |
a list of vectors. The |

`n` |
a vector containing the number of observations at level |

### Details

The procedure does not change the experimental design set of the highest code level. During the procedure, the points of *D_{k-1}* the closest to those of *D_k* with *k=2,...,nlevel* are
removed and they are replaced by the points of *D_k* . Thus, the length of the final *D_{k-1}* could be larger than the one of the initial *D_{k-1}*. (see `"MuFicokm"`

)

### Value

an object of class (`"NestDesign"`

) representing a nested experimental design set.

### Author(s)

Loic Le Gratiet

### References

LE GRATIET, L. & GARNIER, J. (2012), Recursive co-kriging model for Design of Computer Experiments with multiple levels of fidelity, *arXiv:1210.0686*.

### See Also

`MuFicokm`

, `ExtractNestDesign`

, `NestedDesignBuild`

### Examples

1 2 3 4 5 6 7 |

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