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Re: Optimization "AMOEBA" [message #68022 is a reply to message #68021]

Thu, 24 September 2009 00:37

Wout De Nolf
Messages: 194
Registered: October 2008

Senior Member

On Wed, 23 Sep 2009 18:04:46 -0700 (PDT), Nicki
<nickireiter87@yahoo.de> wrote:

> Wuhuu, thank you. The last part does not work though (plot), i just
> commented it out and try to fix it later since the plot is right now
> not that important.
> so now, just that i understand everything...What do I need to change
> and take care of when i also have a 3rd, 4th and maybe even a 5th
> variable?? I don't have to change the function constraint, do i? (the
> next thing will be letting a_max go from 20 to 80.

Constraint will work with any number of variables. To understand what
this function does, try this:

x=indgen(100)-50
P0=50.
dP=10.
plot,x,P0+2.*dP/!pi*atan(x),/ys

The parameter x is always projected between 40 and 60.

Thinking about it, you should probably start AMOEBA with P0=[0,0.]
R=AMOEBA(1.0e-5,SCALE=dP, P0=[0,0.], FUNCTION_VALUE=fval)

> If there is for a
> specific N, a_max and R_i a "NaN" it won't stop the approximation,
> will it?!(i hope you know what i mean))

The constraint function puts box-constraints around each parameter. If
you don't have a box (i.e. the boundaries depend on the value of other
parameters) you need a more complicated constraint function.

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[Message index]

		Re: Optimization "AMOEBA" By: Nicki on Thu, 24 September 2009 06:23
		Re: Optimization "AMOEBA" By: Wout De Nolf on Thu, 24 September 2009 01:13
		Re: Optimization "AMOEBA" By: Wout De Nolf on Thu, 24 September 2009 00:56
		Re: Optimization "AMOEBA" By: Wout De Nolf on Thu, 24 September 2009 00:37
		Re: Optimization "AMOEBA" By: Nicki on Wed, 23 September 2009 19:13
		Re: Optimization "AMOEBA" By: Nicki on Wed, 23 September 2009 18:04
		Re: Optimization "AMOEBA" By: Wout De Nolf on Wed, 23 September 2009 06:41
		Re: Optimization "AMOEBA" By: Jeremy Bailin on Wed, 23 September 2009 04:49
		Re: Optimization "AMOEBA" By: Wout De Nolf on Wed, 23 September 2009 00:54
		Re: Optimization "AMOEBA" By: Nicki on Tue, 22 September 2009 16:30
		Re: Optimization "AMOEBA" By: Wout De Nolf on Mon, 21 September 2009 00:38
		Re: Optimization "AMOEBA" By: Nicki on Fri, 18 September 2009 06:05
		Re: Optimization "AMOEBA" By: Wout De Nolf on Fri, 18 September 2009 04:52
		Re: Optimization "AMOEBA" By: Wout De Nolf on Fri, 18 September 2009 04:45
		Re: Optimization "AMOEBA" By: Wout De Nolf on Thu, 24 September 2009 07:13
		Re: Optimization "AMOEBA" By: Nicki on Wed, 07 October 2009 16:15

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