Look up a registered rule — get_scale

A scoped lookup prefers the entry registered for that scope and falls back to an unscoped one.

get_scale_rule(param, scope = NULL)

Arguments

param: Name of the value column.
scope: Optional dimension namespace.

Value

A list with elements rule, weight and scope, or NULL if param has not been registered.

Examples

register_scale_rule("demand", "sum")
get_scale_rule("demand")
#> $rule
#> [1] "sum"
#> 
#> $weight
#> NULL
#> 
#> $scope
#> NULL
#> 
get_scale_rule("not_registered")
#> NULL
clear_scale_rules("demand")