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MathGroup Archive 2007

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Re: Nminimize: Give Initial values to Decision Variables

  • To: mathgroup at smc.vnet.net
  • Subject: [mg72630] Re: Nminimize: Give Initial values to Decision Variables
  • From: dh <dh at metrohm.ch>
  • Date: Sat, 13 Jan 2007 03:49:44 -0500 (EST)
  • References: <eo7mnc$1o1$1@smc.vnet.net>


Hi Pratim,

if you can spezify a ringe in which the variables for the minimum lie, 

you can spezify this in the first Slot of NMInimize.E.g. assume that 

form f[x,y]= (x - 3)^2 + (y - 5)^2 it is know that xmin is in 2..4 and 

ymin in 4..6:

NMinimize[{(x - 3)^2 + (y - 5)^2, 2 < x < 4, 4 < y < 6}, {x, y}]

Daniel



Pratim Vakish wrote:

>  Hello,

>  I have a nonlinear problem thta I am attemting to solve using NMinimize (NelderMead method). 

>  I would like to give "good" initial values to my decision variables say, x1, x2.

>  Is there a way (command) to do that with Mathematica?

>   

>  Thanks,

>   

>  Pratim

> 

> 



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