galapagos results

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Permalink Reply by David Rutten on May 31, 2014 at 4:17am

How long does a single iteration take? What sort of problem are you trying to solve? What was going on while the solver was running?

The window shows the solver UI for the Simulated Annealing solver, but you have the Evolutionary Solver selected on the toolbar. Which one ran for 4 hours?

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David Rutten

david@mcneel.com

Permalink Reply by Reham Ahmed on May 31, 2014 at 4:23am

thanks david for quick reply 

Evolutionary Solver was run for 4 hours & I don't get any results so I try to switch taps to anther solver but these happened & I didn't get any results only these .

my problem solver for multi conditions , minimizing solar loads + density+distance for street network 


I can post it 

Permalink Reply by Reham Ahmed on May 31, 2014 at 4:30am

I missed to say it freeze while working & I doubt that  something wrong happened so i stopped it to see results .

I was tried the same algorithm file optimization before & it works !

Permalink Reply by Reham Ahmed on May 31, 2014 at 4:48am

my gh definition

single iteration ~ quarter hour

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Permalink Reply by Reham Ahmed on May 31, 2014 at 4:49am

Permalink Reply by David Rutten on May 31, 2014 at 5:47am

If a single iteration takes a quarter of an hour then in 4 hours you can manage 16 iterations, which isn't enough to populate even a single generation. I don't think you'll be able to use a stochastic solver like Galapagos for something which takes that long to evaluate. 

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David Rutten

david@mcneel.com

Permalink Reply by Reham Ahmed on May 31, 2014 at 6:21am

I don't know optimization method except galapagos

what's my alternatives ?

needing scripting ? or what ?

Permalink Reply by David Rutten on May 31, 2014 at 1:46pm

You could use Galapagos with the Annealing solver, then just abort it after a while. It should give you the best result it found so far, though if you abort it early you basically just get a random sampling.

For something which is this intensive to compute (why is it taking so long btw?), you should really look into dedicated solvers. A dedicated solver understands the problem and is thus able to optimize in a smart way. However you'll probably have to program such a solver from scratch, which is a lot of work.

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David Rutten

david@mcneel.com