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Amend Attribute

amend.Rd

Update specific parameter(s) of specific attribute(s).

Usage

amend(config, item = get_context(), ...)

Arguments

config

the config list.

item

the name (id) of the item group.

...

one or several attribute instructions.

Value

a list

Details

The function only understands attribute instruction. It can handle multiple instructions in ....

Note that it is forbidden to update:

  • the id attribute (any parameter),

  • the name and/or type of an attribute.

When item is set in the parent frame, then the attribute can be skipped in the function call.

See also

design(), parent.frame()

Examples

if (FALSE) { # \dontrun{
# create baseline
config <- design(project = "test",
                 item = "foo") |>
  extend(item = "foo",
         attribute = c(name = "total", type = "integer"))

# skip item argument (in the following calls)
item <- "foo"

# single instruction
config |>
  amend(attribute = c(name = "total", default = 12))
config |>
  amend(attribute = c(name = "total", values = "suggest(12)"))

# multiple instructions
config |>
  amend(attribute = c(name = "total", values = "suggest(12)"),
        attribute = c(name = "total", default = "0"))
} # }