Create a new
Create a Grid object.
Grid(levels, nlevels = NULL, dimNames = NULL, index = NULL)
- 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.
- Integer vector giving the number of levels by
dimension. This formal argument is used only when
levelsis missing. In this case, the nodes for dimension $i$ will be regularly spaced between
- If the list
levelsdoes not have names, then the character vector
dimNameswill be used.
- 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.
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
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
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)
Looks like there are no examples yet.