Phase {DiGGer}R Documentation

DiGGer Phase object constructor function.

Description

Create a Phase object component of a DiGGer search.

Usage

Phase(rowsInSwapBlock = 1, columnsInSwapBlock = 1,
rowsInCorrelationBlock = 1, columnsInCorrelationBlock = 1, aType =
"A++", targetAValue = 0, maxInterchanges = 1e+05, searchIntensity = 100,
numberOfObjectives = 1, objectives = list(Objective()))

Arguments

rowsInSwapBlock

Number of rows in the Swap Block template.

columnsInSwapBlock

Number of columns in the Swap Block template.

rowsInCorrelationBlock

Number of rows in the blocks of correlated error.

columnsInCorrelationBlock

Number of columns in the blocks of correlated error.

aType

The A-measure code, "A++", "Agg", "A22", "A11", "A1+", "Aa2" or "Aaa".

targetAValue

A-measure stopping rule for this Phase.

maxInterchanges

Maximum number of treatment interchanges stopping rule for this Phase.

searchIntensity

Percentage of interchanges to be considered for non-improving treatment interchange.

numberOfObjectives

Number of objectives in this search Phase.

objectives

List of DiGGer Objective() objects to be optimised.

Details

A DiGGer search Phase is the framework for a call to the DiGGer search program. The Phase object is a component of a DiGGer object. When the DiGGer search is run each Phase optimises the current design subject to the A-measure aType measured on the Objectives specified. A DiGGer search may have more than one Phase. After a search Phase the optimised design is carried forward to the next Phase of the search.

In this way a DiGGer search involves progressive refinement of a design.

Swap block dimensions should be adjusted at the start of each search Phase so that objectives already optimised are not compromised. This will mean that swap blocks should not be bigger than the smallest block in a completed search Phase.

The blocks of correlated error defined by rowsInCorrelationBlock and columnsInCorrelationBlock must tile evenly over the design dimensions.

Value

.nrbs

Number of rows in the Swap Block template.

.ncbs

Number of columns in the Swap Block template.

.nrbv

Number of rows in the blocks of correlated error.

.ncbv

Number of columns in the blocks of correlated error.

.atype

A-measure code.

.targa

Target A-measure.

.maxint

Maximum interchanges to test.

.srchint

Search intensity.

.nobj

Number of objectives.

.objve

List of DiGGer Objectives.

Author(s)

Neil Coombes


[Package DiGGer version 1.0.5 Index]