index (or name) of the element of the stack to extract or replace
...
extra arguments for generic functionality
MARGIN
which dimension is the stacking dimension? you seldom want to touch this!!
value
for the setting operation, the new data.frame to replace the selected one; note
that the compatibility of the dimensions of value is only checked for setStackElement.DataFrameStack
and its Spatial derivates; for other methods setStackElement can break the consistency of the
stack!
Value
For the getters, the result is the data.frame of the stack asked for. For the setters
the result is the original DataFrameStack with the corresponding element replaced. Spatial methods
return the corresponding spatial object, ie. the spatial information of the stack is transferred to the
extracted element.