Description Usage Arguments Value Author(s)

Create a matrix or data.frame to a valid dataset of class sss for spatial smoothing splines. Those dataset can be used later by functions s2D for tensor product (natural) cubic splines or p-splines, and scp for estimating spatial smoothing splines models.

1 2 3 4 |

`X` |
a matrix or data-frame. Every row must correspond to a point location in a two-dimensional space (coordinates). Coordinates columns can be included in |

`coords` |
two-columns numeric matrix of coordinates (optional). |

`data` |
a data-frame containing the variables measured at the locations given by |

`coords.col` |
numeric vector. The number of columns in |

`data.col` |
numeric vector. The number of columns in |

`...` |
slots elements to create a new |

`x` |
an object to check validity as member of class |

- data
a data-frame containing the variables measured at the locations given by

`coords`

.- coords
a matrix containing the two columns of observed coordinates for the data.

- grid
a grid matrix containing the two columns of coordinates.

- knots
a named list with the design points (knots) in every coordinate. Equivalent to a

`grid.list`

object.- W
a spatial incidence matrix. If

`contract=TRUE`

it is*W_{ij}*, otherwise*W_{ji}*.- contract
logical. The same value as the argument

`contract`

.- regular
logical. If the coordinates are observed at regular points it is

`TRUE`

,`FALSE`

otherwise (missing coordinates in any direction).

Mario A. Martinez Araya, r@marioma.me

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