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Re: Optimization "AMOEBA" [message #68021 is a reply to message #68020]

Thu, 24 September 2009 00:56

Wout De Nolf
Messages: 194
Registered: October 2008

Senior Member

On Wed, 23 Sep 2009 19:13:13 -0700 (PDT), Nicki
<nickireiter87@yahoo.de> wrote:

> Okay, I added the other variables now and it works... and also the 3D
> plot works...
> If I have 3 Variables now, what do i need to add to the ploting
> section? And is it possible to get the results for a second minimum as
> well (if there is another local minimum?)

I just included the surface plot to see whether the maximum found by
amoeba (within the box constraints) made any sense.

If you want to check this for more than 2 parameters, you can do
something like changing one of the parameters at a time while keeping
the others fixed at their optimized position (i.e. where the function
is maximal):

; Plot
n=200
b=P0-dP
inc=(2*dP)/n
y=fltarr(n)
for j=0,n_elements(P0)-1 do begin
x=b[j]+inc[j]*indgen(n)

P=xmax
for i=0,n-1 do begin
P[j]=x[i]
y[i]=-func(P,/NOCONSTR)
endfor

window,j
plot,x,y
plots,xmax[[j,j]],[!y.crange[0],ymax],psym=-2
endfor

As for the second local minimum: I guess you need to play with your
box-constraints to get one or the other.

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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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