SpaDES.core (version 2.0.5)

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

Description

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

Usage

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

Value

Invisibly return TRUE indicating object exists; FALSE if not.

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.

Author

Alex Chubaty and Eliot McIntire

See Also

library().

Examples

sim <- simInit()
sim$a <- 1
sim$b <- list(d = 1)
sim$r <- terra::rast(terra::ext(0,2,0,2), res = 1, vals = 2)
sim$s <- c(sim$r, terra::rast(terra::ext(0,2,0,2), res = 1, vals = 3))
names(sim$s) <- c("r1", "r2") # give layer names
(checkObject(sim, name = "a")) # TRUE
(checkObject(sim, name = "b", layer = "d")) # TRUE
(checkObject(sim, name = "d")) # FALSE
(checkObject(sim, name = "r")) # TRUE
(checkObject(sim, object = sim$s)) # TRUE
(checkObject(sim, object = sim$s, layer = "r1")) # TRUE