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Re: Optimization "AMOEBA" [message #68093 is a reply to message #68074]

Fri, 18 September 2009 06:05

Nicki
Messages: 14
Registered: September 2009

Junior Member

O thanks so much for that... Just tried it also with my more
complicated function and it works... But now it's getting tricky:)
I have a 2nd varible...
this is set to 60 at the beginning and should vary plus/minus 30.
However my IDL cannot do it, it can only do scale 1, everything that
is more than one does not work out.....

That's the code:

FUNCTION FUNC, P

z=120.0
N_rows=3.0
d_fov=67
mu=438.689
R_tot=1.5
a_max=30
N=P[1]
R_i=P[0]
;a_max=P[2]

x=N*tan(a_max/2.0*!pi/180.0)*1.1/N_rows/!pi-1.0

a=2.0*asin((1.0/x+1.0)*d_fov/2/z)*180/!pi

d=sqrt(R_tot^2-x^2*(R_i)^2)/(x+1)-alog(2)/mu*tan(a/2*!pi/180 )

S=N*(1+x)^2/16/x^2/z^2*(d^2+2/mu*d*tan(a/2*!pi/180)+2/mu^2*( tan(a/2*!
pi/180))^2)*100

RETURN, -S

END

R=AMOEBA(1.e-1, SCALE=[0.50, 30.], P0=[0.55, 60.],
FUNCTION_VALUE=fval)

;Check for convergence:
;IF N_ELEMENTS(R) EQ 1 THEN MESSAGE, 'AMOEBA failed to converge'

; Print results:
PRINT, 'R_i, N:', r, $
'function value: ', fval[0]

END

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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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