Select a mutation type for JEGA methods

Specification

Alias: none

Argument(s): none

Default: replace_uniform

Required/Optional	Description of Group	Dakota Keyword	Dakota Keyword Description
Required (Choose One)	Group 1	bit_random	Mutate by flipping a random bit
		replace_uniform	Use uniformly distributed value over range of parameter
		offset_normal	Set mutation offset to use a normal distribution
		offset_cauchy	Use a Cauchy distribution for the mutation offset
		offset_uniform	Set mutation offset to use a uniform distribution
Optional		mutation_rate	Set probability of a mutation

Description

Five mutation types are available for selection by keyword: replace_uniform, bit_random, offset_cauchy, offset_normal, and offset_uniform. They are described in greater detail on their respective keyword pages.

The offset_* mutators all act by adding a random "offset" to a variable value. The random amount has a mean of zero in all cases. The size of the offset is controlled using the mutation_scale keyword, which is interpreted differently for each offset_* type.

The rate of mutations for all types is controlled suing the mutation_rate. The rate is applied differently in each mutation_type.