R: Generates a random design for a parameter set.

generateRandomDesign {ParamHelpers} | R Documentation

## Generates a random design for a parameter set.

### Description

The following types of columns are created:

numeric(vector) | `numeric`
integer(vector) | `integer`
discrete(vector) | `factor` (names of values = levels)
logical(vector) | `logical`

If you want to convert these, look at `BBmisc::convertDataFrameCols()`. For discrete vectors the levels and their order will be preserved, even if not all levels are present.

The algorithm simply calls `sampleValues()` and arranges the result in a data.frame.

Parameters are trafoed (potentially, depending on the setting of argument `trafo`); dependent parameters whose constraints are unsatisfied are set to `NA` entries.

`generateRandomDesign` will NOT work if there are dependencies over multiple levels of parameters and the dependency is only given with respect to the “previous” parameter. A current workaround is to state all dependencies on all parameters involved. (We are working on it.)

Note that if you have trafos attached to your params, the complete creation of the design (except for the detection of invalid parameters w.r.t to their `requires` setting) takes place on the UNTRANSFORMED scale. So this function samples from a uniform density over the param space on the UNTRANSFORMED scale, but not necessarily the transformed scale.

### Usage

    generateRandomDesign(n = 10L, par.set, trafo = FALSE)

### Arguments

`n` | (`integer(1)`) Number of samples in design. Default is 10.
`par.set` | ParamSet Parameter set.
`trafo` | (`logical(1)`) Transform all parameters by using theirs respective transformation functions. Default is `FALSE`.

### Value

data.frame. Columns are named by the ids of the parameters. If the `par.set` argument contains a vector parameter, its corresponding column names in the design are the parameter id concatenated with 1 to dimension of the vector. The result will have an `logical(1)` attribute “trafo”, which is set to the value of argument `trafo`.

[Package ParamHelpers version 1.13 Index]