[Scilab-users] Optimization question

[Márton Markó]

Dear Eduardo,

Maybe a stupid question, but why do you want to optimize numerically
a second order polinom?
What's the problem with the analytical solution?

Marci


--
              Márton Markó

     Wigner Research Centre for Physics
       Neutron Spectroscopy Department

address: Budapest, Konkoly Th. M. str 29-33, H-1121, Hungary
mail:    Budapest, P.O. Box 49 H-1525 HUNGARY
tel:     +36/1-392 2222/1682
fax:     +36/1-392 2501
email:   marko at szfki.hu


On Tue, 12 Aug 2014, ebmb.sci wrote:

> Hello All,
> please, could someone guide me on how to proceed to minimize the following
> polynomial using functions optim and numdiff. Since the parameters A and B
> have different constraints (i.e.: A = [0 1] and B = [1000 2000]), how must I
> sign the values and pass them for optim? I implemented a basic script to try
> to do it, but it always returns with wrong results.
>
> function f = myFc(x)
>   a = x(1);
>   b = x(2);
>   f = 0.000791 + 0.000027*a + -0.000037*b + 0.000180*a*b + -0.000126*a^2 +
> -0.000162*b^2;
> endfunction
>
> function [f, g, ind] = myFcCost(x, ind)
>        f = myFc(x);
>        g = numdiff(myFc, x);
> endfunction
>
> x0 = [0 1];
>
> [fopt, xopt] = optim(myFcCost, 'b', [0 1], [1000 2000], x0);
>
> I am so thanks for any help in advance!
>
> Best regards,
> Eduardo.
>
>
>
>
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