smint (version 0.4.2)

Grid: Create a new Grid object

Description

Create a Grid object.

Usage

Grid(levels, nlevels = NULL, dimNames = NULL, index = NULL)

Arguments

levels

A list with the levels of the variables. The length of the list gives the spatial dimension. The $i$-th element must be a numeric vector containing the distinct values of the corresponding variable.

nlevels

Integer vector giving the number of levels by dimension. This formal argument is used only when levels is missing. In this case, the nodes for dimension $i$ will be regularly spaced between 0.0 and 1.0.

dimNames

If the list levels does not have names, then the character vector dimNames will be used.

index

An array with integer values and dimension corresponding to the spatial dimensions. Each value represent the number of the corresponding node in a "flat" representation (data.frame or matrix), and will be used in tasks such as interpolation.

Value

An object with S4 class "Grid". If needed, this object can be coerced to a data frame or to a matrix by using the methods as.data.frame or as.matrix.

Examples

myGD1 <- Grid(levels = list("X" = c(0, 1), "Y" = c(0.0, 0.5, 1.0)))
## the same with less effort
myGD2 <- Grid(nlevels = c("X" = 2, "Y" = 3))
nlevels(myGD2)
levels(myGD2)