Grid
From smint v0.4.2
by Yann Richet
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 between0.0
and1.0
.  dimNames
 If the list
levels
does not have names, then the character vectordimNames
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 nondefault index
is provided, the
levels must be sorted. This rule is intended to reduce the risk of
error.
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)
Community examples
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