[EvA] Trouble with constraints

[Fabian Becker]

Hi Johannes,
can you send me the complete code you are using? I would like to do some 
debugging on that issue.

One note upfront: EvA2Problem does not implement "getProblemDimension()" 
which should prevent the class from compile at all.

Best regards,
Fabian

On 25.04.2012 18:02, Johannes wrote:
> Hello,
>
> I want to solve a rather simple problem with the EvA2 toolbox
> using the Java interface.
> Unfortunately I cannot get the constraints to work as they should,
> I set them up, but they do not seem to be respected by the solver.
>
> If I did not misunderstand something fundamental on the issue, they
> are supposed to work like shown below. Still, I get results containing
> negative values, which should not be the case.
> Any hints are appreciated.
>
> Best regards
>
> Johannes
>
> I run this:
>
> double[] lösung =
> OptimizerFactory.optimizeToDouble(OptimizerFactory.RANDOM, new
> EvA2Problem10(zielfunktion));
>
> with this class:
>
> public abstract class EvA2Problem extends AbstractProblemDouble {
> 	
> 	protected static final long serialVersionUID = 7005447722364059112L;
> 	protected Abweichung abweichung;
> 	
> 	public EvA2Problem(Abweichung abweichung)
> 	{
> 		this.abweichung = abweichung;
> 		setWithConstraints(true);
> 		setDefaultRange(10.0);
> 		setConstraints(new AbstractConstraint[]{
> 				new IntervalConstraint(0, 0.0, 1.0),
> 				new IntervalConstraint(1, 0.0, 1.0),
> 				new IntervalConstraint(2, 0.0, Double.MAX_VALUE),
> 				new IntervalConstraint(3, 0.0, Double.MAX_VALUE),
> 				new IntervalConstraint(4, 0.0, Double.MAX_VALUE),
> 				new IntervalConstraint(5, 0.0, Double.MAX_VALUE),
> 				new IntervalConstraint(6, 0.0, Double.MAX_VALUE),
> 				new IntervalConstraint(7, 0.0, Double.MAX_VALUE),
> 				new IntervalConstraint(8, 0.0, Double.MAX_VALUE),
> 				new IntervalConstraint(9, 0.0, Double.MAX_VALUE)
> 		});
> 	}
>
> 	@Override
> 	public double[] eval(double[] values) {
> 		return new double[]{abweichung.value(values)};
> 	}
> }
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