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Re: variable range
- From: Z F <mail4me9999 at yahoo dot com>
- To: Przemyslaw dot Sliwa at ecb dot int, gsl-discuss at sources dot redhat dot com
- Date: Wed, 30 Jul 2003 10:52:46 -0700 (PDT)
- Subject: Re: variable range
how about x=atan(y)-type of varaible change?
by using coefficients it is possible to make x in the proper range and
y is unconstraint.
Z
--- Przemyslaw.Sliwa@ecb.int wrote:
> Could you give me any example???
> I do not have any idea how to proceed with it.
>
> Thanks,
>
> Przem
>
>
>
> Hello,
>
> a good idea is to make a change of variable in such a way that
> the new variable are unconstrained.
>
> I hope that helps,
> Jerome
>
> Sang-Joon Lee wrote:
> Hi,
>
> In using the GSL "Multidimensional Minimization" algorithms, I would
> like
> to limit the range of variables. For instance, in a function,
> f(x)=3*(x-4)*(x-4)+2, I would like to make x be a positive real
> number.
> I would appreciate if you let me know how to do this.
>
> Sincerely yours,
>
> Sang-Joon Lee
>
>
>
>
>
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