typing starting values in FindMinimum

• To: mathgroup at smc.vnet.net
• Subject: [mg15391] typing starting values in FindMinimum
• From: "Albert Maydeu-Olivares" <amaydeu at nil.fut.es>
• Date: Tue, 12 Jan 1999 03:14:53 -0500
• Organization: University of Barcelona
• Sender: owner-wri-mathgroup at wolfram.com

```Hi everyone,

Consider the use of FindMinimum when the function to be minimized
depends on several variables

In[1]:=
j={{l2,l1,0},{l3,0,l1},{0,l3,l2}};
e={0.56 -l1 l2,0.48 -l1 l3, 0.42 -l2 l3};
FindMinimum[Apply[Plus,e^2],{l1,.5},{l2,.5},{l3,.5},Method->Newton,

Out[1]=
{8.68919*^-23, {l1->.8, l2->.7, l3->.6}}

Does anyone know to avoid having to type in all the variables names and
starting values?
I have some problems with 100 variables!

Of course I can construct

In[3]:=
theta={l1,l2,l3};
start ={0.5,0.5,0.5};
startval=Transpose[{theta,start}]

Out[3]:=
{{l1,0.5},{l2,0.5},{l3,0.5}}

but that is not what FindMinimum is expecting.

--

Albert Maydeu-Olivares				Tel. +34 3 4021079 ext. 3099 Faculty of
Psychology 				Fax. +34 3 4021362 University of Barcelona				E-Mail:
amaydeu at tinet.fut.es Passeig de la Vall d'Hebron, 171.
08035 - Barcelona (Spain)

```

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