Check for existence of object(s) referenced by a objects slot of a simList object

Check that a named object exists in the provide simList environment slot, and optionally has desired attributes.

checkObject(sim, name, object, layer, ...)

# S4 method for simList,missing,Raster,character
checkObject(sim, name, object, layer, ...)

# S4 method for simList,missing,ANY,missing
checkObject(sim, name, object, layer, ...)

# S4 method for simList,character,missing,missing
checkObject(sim, name, object, layer, ...)

# S4 method for simList,character,missing,character
checkObject(sim, name, object, layer, ...)

# S4 method for missing,ANY,missing,ANY
checkObject(sim, name, object, layer, ...)

Arguments

sim	A simList object.
name	A character string specifying the name of an object to be checked.
object	An object. This is mostly used internally, or with layer, because it will fail if the object does not exist.
layer	Character string, specifying a layer name in a Raster, if the name is a Raster* object.
...	Additional arguments. Not implemented.

Value

Invisibly return TRUE indicating object exists; FALSE if not.

See also

library.

Author

Alex Chubaty and Eliot McIntire