make.surface.grid(grid.list, X, nx=30, ny=30, info.list=F, FUN=median)
grid.list
| A list with as many components as variables describing the surface. All components should have a single value except the two that give the grid points for evaluation. If the matrix or data frame has column names, these must appear in the grid list. |
X
| Matrix of independent variables. |
nx
| Number of grid points evenly spaced over the range of x-values. |
ny
| Number of grid points evenly spaced over the range of y-values. |
info.list
| Surface information, component of attributes. |
FUN
|