single integer or vector of integers whose positions or names
match the parameters in a model's tuning grid and which specify the number
of values used to construct the grid.
random
number of unique points to sample at random from the grid
defined by size. If size is a single unnamed integer, then
random = Inf will include all values of all grid parameters in the
constructed grid, whereas random = FALSE will include all values of
default grid parameters.
Details
Returned TuningGrid objects may be supplied to
TunedModel for automated construction of model tuning grids.
These grids can be extracted manually and viewed with the
expand_modelgrid function.