[Scilab-users] Scilab control after an impossible calculation

[Tim Wescott]

For that matter, you can pass a vector of infemums and supremums for
each element of the vector you're optimizing.  (and +inf and -inf work,
for things that don't matter).  As long as you can optimize within a
rectilinear space then you can easily dodge the "bad" values.  It's in
the help for optim.

On Thu, 2016-10-06 at 13:12 +0200, Serge Steer wrote:
> If you use optim you can  set the ind retured arg to -1 in the cost
> function to say that the function cannot be evaluated at this point.
> 
> Serge
> 
> Le 06/10/2016 à 10:51, paul.carrico at free.fr a écrit :
> 
> > Hi All
> > 
> >  
> > 
> > I’m using Scilab as the interface between my optimizer and my finite
> > element solver(s) and sometimes Scilab stops because of unexpected
> > and impossible calculus (1/x with x = 0 as an example ); obviously
> > Scilab stops (and so the optimization).
> > 
> >  
> > 
> > I’m wondering if it’s possible:
> > 
> > -          To ask back Scilab a message such as “hey I crashed
> > because you’re a fool and you’ve not anticipated an impossible
> > calculation !!!”
> > 
> > -          To get back Scilab control in order to avoid optimization
> > process crash ? I’ve been thinking in affecting a cost function
> > value at %inf for example (not elegant I recognize)
> > 
> >  
> > 
> > I don’t know if I’m understandable enough …
> > 
> >  
> > 
> > Paul
> > 
> > 
> > 
> > 
> > _______________________________________________
> > users mailing list
> > users at lists.scilab.org
> > http://lists.scilab.org/mailman/listinfo/users
> 
> 
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-- 

Tim Wescott
www.wescottdesign.com
Control & Communications systems, circuit & software design.
Phone: 503.631.7815
Cell:  503.349.8432