ParamSetShadow

Wraps another ParamSet and shadows out a subset of its Params. The original ParamSet can still be accessed through the $origin field; otherwise, the ParamSetShadow behaves like a ParamSet where the shadowed Params are not present.

Super class

paradox::ParamSet -> ParamSetShadow

Active bindings

params

(named list of Param) List of Param that are members of the wrapped ParamSet with the shadowed Params removed.

params_unid

(named list of Param) List of Param that are members of the wrapped ParamSet with the shadowed Params removed. This is a field mostly for internal usage that has the $ids set to invalid values but avoids cloning overhead.

deps

(data.table)
Table of dependencies, as in ParamSet. The dependencies that are related to shadowed parameters are not exposed. This data.table should be seen as read-only and not modified in-place; instead, the $origin's $deps should be modified.

values

(named list)
List of values, as in ParamSet, with the shadowed values removed.

set_id

(data.table)
Id of the wrapped ParamSet. Changing this value will also change the wrapped ParamSet's $set_id accordingly.

origin

(ParamSet)
ParamSet being wrapped. This object can be modified by reference to influence the ParamSetShadow object itself.

Methods

Public methods

• ParamSetShadow$new()

• ParamSetShadow$add()

• ParamSetShadow$subset()

• ParamSetShadow$add_dep()

• ParamSetShadow$clone()

Inherited methods

• paradox::ParamSet$assert()
• paradox::ParamSet$assert_dt()
• paradox::ParamSet$check()
• paradox::ParamSet$check_dt()
• paradox::ParamSet$format()
• paradox::ParamSet$get_values()
• paradox::ParamSet$ids()
• paradox::ParamSet$print()
• paradox::ParamSet$search_space()
• paradox::ParamSet$set_values()
• paradox::ParamSet$test()
• paradox::ParamSet$test_dt()

---

Method new()

Initialize the ParamSetShadow object.

Usage

ParamSetShadow$new(set, shadowed)

Arguments

set

(ParamSet)
ParamSet to wrap.

shadowed

(character)
Ids of Params to shadow from sets, must be a subset of set$ids().

---

Method add()

Adds a single param or another set to this set, all params are cloned.

This calls the underlying ParamSet's $add() function.

Param with ids that also occur in the underlying ParamSet but are shadowed can not be added and instead will result in an error.

Usage

ParamSetShadow$add(p)

Arguments

p

(Param | ParamSet)

Returns

invisible(self).

---

Method subset()

Reduces the parameters to the ones of passed ids.

This calls the underlying ParamSet's $subset() function.

Usage

ParamSetShadow$subset(ids)

Arguments

ids

(character)

Returns

invisible(self).

---

Method add_dep()

Adds a dependency to the unterlying ParamSet.

Usage

ParamSetShadow$add_dep(id, on, cond)

Arguments

id

(character(1))

on

(character(1))

cond

(Condition)

Returns

invisible(self).

---

Method clone()

The objects of this class are cloneable with this method.

Usage

ParamSetShadow$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

p1 = ps(x = p_dbl(0, 1), y = p_lgl())
p1$values = list(x = 0.5, y = TRUE)
print(p1)
#> <ParamSet>
#>    id    class lower upper nlevels        default value
#> 1:  x ParamDbl     0     1     Inf <NoDefault[3]>   0.5
#> 2:  y ParamLgl    NA    NA       2 <NoDefault[3]>  TRUE

p2 = ParamSetShadow$new(p1, "x")
print(p2$values)
#> $y
#> [1] TRUE
#> 

p2$values$y = FALSE
print(p2)
#> <ParamSetShadow>
#>    id    class lower upper nlevels        default value
#> 1:  y ParamLgl    NA    NA       2 <NoDefault[3]> FALSE

print(p2$origin$values)
#> $x
#> [1] 0.5
#> 
#> $y
#> [1] FALSE
#>