sss-class: Class '"sss"'
In scpm: An R Package for Spatial Smoothing

Description Usage Arguments Objects from the Class Slots Author(s)

Create a dataset 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.

sss(...)

...

Slots elements to be included into the sss dataset. Allowed slots names are data, coords, grid, knots, W, contract (to be discarded in the future), and regular.

Objects can be created by calls of the form sss(...).

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).