# Grid

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##### Create a new Grid object

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.

##### Note

If index is not provided, the vectors in the levels list can be unsorted, and they will be sorted. However, when a non-default index is provided, the levels must be sorted. This rule is intended to reduce the risk of error.

• Grid
##### 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)

Documentation reproduced from package smint, version 0.4.2, License: GPL-3

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