The library documents itself · Numeric & optimization

stzMultiObjectiveSolver

44 own methods · 0 forms written with extensions, listed under their method

the source: base/optim/stzMultiObjectiveSolver.ring(opens in a new tab) · All classes · The area reference: Numeric & optimization

Under each method, its extensions (Q CS XT Z ZZ IB W U): bold and ticked, it exists; struck, it does not. The extensions and what they mean

Examples: 0 come from the library's tests; 8 were composed from each method's signature and run for this page, on a fresh object, for example o1 = new stzMultiObjectiveSolver() o1.AddVariable("x", 0, 10) o1.Maximize("x") o1.Minimize("x"). 36 methods have none yet. Examples run on 2026-10-04 07:31 inside the library at commit 0e72e2e2c.

Method

Explanation, as the source carries it

init

(no comment in the source: the name reads as a sentence) initno extension

clear

(no comment in the source: the name reads as a sentence) clearno extension

addVariable

Variables Management (inherited from stzLinearSolver)no extension

addIntegerVariable

Same as addVariable: Variables Management (inherited from stzLinearSolver)no extension

addBinaryVariable

Same as addVariable: Variables Management (inherited from stzLinearSolver)no extension

Variables

(no comment in the source: the name reads as a sentence) variables

composed example

o1 = new stzMultiObjectiveSolver()
o1.AddVariable("x", 0, 10)
o1.Maximize("x")
o1.Minimize("x")
? @@( o1.Variables() )
#--> [ [ [ "name", "x" ], [ "lowerbound", 0 ], [ "upperbound", 10 ], [ "type", "continuous" ] ] ]

composed from the signature, run for this page

no extension

Vars

(no comment in the source: the name reads as a sentence) vars

composed example

o1 = new stzMultiObjectiveSolver()
o1.AddVariable("x", 0, 10)
o1.Maximize("x")
o1.Minimize("x")
? @@( o1.Vars() )
#--> [ [ [ "name", "x" ], [ "lowerbound", 0 ], [ "upperbound", 10 ], [ "type", "continuous" ] ] ]

composed from the signature, run for this page

no extension

VariableNames

(no comment in the source: the name reads as a sentence) variable namesalso written: VarNames

composed example

o1 = new stzMultiObjectiveSolver()
o1.AddVariable("x", 0, 10)
o1.Maximize("x")
o1.Minimize("x")
? @@( o1.VariableNames() )
#--> [ "x" ]

composed from the signature, run for this page

no extension

addConstraint

Constraints Management (inherited from stzLinearSolver)no extension

constraints

(no comment in the source: the name reads as a sentence) constraintsno extension

addObjective

Multi-Objective Functionsno extension

maximize

(no comment in the source: the name reads as a sentence) maximizeno extension

minimize

(no comment in the source: the name reads as a sentence) minimizeno extension

objectives

(no comment in the source: the name reads as a sentence) objectives

composed example

o1 = new stzMultiObjectiveSolver()
o1.AddVariable("x", 0, 10)
o1.Maximize("x")
o1.Minimize("x")
? @@( o1.objectives() )
#--> [ [ [ "expression", "x" ], [ "type", "maximize" ] ], [ [ "expression", "x" ], [ "type", "minimize" ] ] ]

composed from the signature, run for this page

no extension

setNSGAParameters

Algorithm Parametersno extension

solve

Solving Methods

composed example

o1 = new stzMultiObjectiveSolver()
o1.AddVariable("x", 0, 10)
o1.Maximize("x")
o1.Minimize("x")
o1.Solve("nsga_ii")
? o1.Status()
#--> optimal

composed from the signature, run for this page

no extension

solveWithNSGAII

(no comment in the source: the name reads as a sentence) solve with nsgaiino extension

solveWithEpsilonConstraint

(no comment in the source: the name reads as a sentence) solve with epsilon constraintno extension

initializePopulation

NSGA-II Helper Methodsno extension

generateRandomSolution

(no comment in the source: the name reads as a sentence) generate random solutionno extension

SetSeed

THE MULTIPLIER IS NOT ARBITRARY, and the reason is copied from stzNeuralNetwork because it was found the hard way there: Park-Miller's 16807 is chosen for HARO'S DOUBLES, since 16807 * 2^31 < 2^53 so the product never loses integer bits. The classic 1103515245 multiplier OVERFLOWS a double and degenerates -- in stzNeuralNetwork that showed up live as every seed producing the same network.no extension

Seed

(no comment in the source: the name reads as a sentence) seedno extension

evaluateObjectives

(no comment in the source: the name reads as a sentence) evaluate objectivesno extension

calculateObjectiveValue

(no comment in the source: the name reads as a sentence) calculate objective valueno extension

nonDominatedSort

(no comment in the source: the name reads as a sentence) non dominated sortno extension

dominates

(no comment in the source: the name reads as a sentence) dominatesno extension

calculateCrowdingDistance

(no comment in the source: the name reads as a sentence) calculate crowding distanceno extension

sortFrontByObjective

(no comment in the source: the name reads as a sentence) sort front by objectiveno extension

createNewPopulation

(no comment in the source: the name reads as a sentence) create new populationno extension

tournamentSelection

(no comment in the source: the name reads as a sentence) tournament selectionno extension

crossover

(no comment in the source: the name reads as a sentence) crossoverno extension

mutate

(no comment in the source: the name reads as a sentence) mutateno extension

calculateEpsilonRanges

Epsilon Constraint Helper Methodsno extension

calculateObjectiveBound

(no comment in the source: the name reads as a sentence) calculate objective boundno extension

extractCoefficient

Utility Methods (inherited from stzLinearSolver)no extension

parseObjectiveCoefficients

(no comment in the source: the name reads as a sentence) parse objective coefficientsno extension

getSolutionValue

(no comment in the source: the name reads as a sentence) get solution valueno extension

paretoSolutions

Solution Access

composed example

o1 = new stzMultiObjectiveSolver()
o1.AddVariable("x", 0, 10)
o1.Maximize("x")
o1.Minimize("x")
o1.Solve("nsga_ii")
? len(o1.ParetoSolutions())
#--> 50

composed from the signature, run for this page

no extension

bestCompromiseSolution

(no comment in the source: the name reads as a sentence) best compromise solution

composed example

o1 = new stzMultiObjectiveSolver()
o1.AddVariable("x", 0, 10)
o1.Maximize("x")
o1.Minimize("x")
o1.Solve("nsga_ii")
? @@( o1.BestCompromiseSolution() )
#--> [ [ "solution", [ [ "x", 0 ] ] ], [ "objectives", [ 0, 0 ] ], [ "rank", 1 ], [ "crowdingdistance", 999999 ], [ "dominatedsolutions", [ ] ], [ "dominationcount", 0 ] ]

composed from the signature, run for this page

no extension

status

(no comment in the source: the name reads as a sentence) status

composed example

o1 = new stzMultiObjectiveSolver()
o1.AddVariable("x", 0, 10)
o1.Maximize("x")
o1.Minimize("x")
o1.Solve("nsga_ii")
? o1.Status()
#--> optimal

composed from the signature, run for this page

no extension

iterations

(no comment in the source: the name reads as a sentence) iterationsno extension

solveTime

(no comment in the source: the name reads as a sentence) solve timeno extension

show

Display and Reportingno extension

exportParetoFrontCSV

(no comment in the source: the name reads as a sentence) export pareto front csvno extension