Re: [Help-gsl] least-squares fitting or minimization with constrained parameters

[Brian Gough]

Frank Küster writes:
 > I am wondering whether (and how) it is possible to use the least-squares
 > fitting, or alternatively minimization functions of gsl with constrained
 > parameters.  What I mean with this is that I want to force the function
 > into the correct local minimum by supplying information which parameter
 > values are physically meaningful for these particular data, or which of
 > two degenerate minima I would like (to be able to compare different
 > fits).  For example, if the function is the sum of two exponentials, I
 > would like to perform a least-squares fit to some data with the
 > constrain that the first of them has the shorter relaxation time.
 > 
 > Is this possible, and how would that be implemented?

Take a look at http://ool.sourceforge.net/ listed on the main GSL page
at gnu.org

-- 
Brian Gough

Network Theory Ltd,
Publishing the GSL Manual --- http://www.network-theory.co.uk/gsl/manual/