[Help-gsl] Re: constraints over variables?

[Rodney Sparapani]

Claudio Ochoa wrote:
> Hi, I am pretty new to gsl, and I am using a SV
> decomposition thru gsl_linalg_SV_solve() to solve a linear
> least squares problem.
> Since I have some extra information about the variables, for
> instance, I know that some of them are negative or positive,
> I was wondering if it is possible to input this information
> somehow to gsl in order to obtain more accurate results.
> Otherwise, many times the results I get from the function
> above assign "not allowed" values to certain variables.
>
> Any help will be appreciated.
>
> Thanks
>   Claudio

If a particular coefficient goes in the wrong direction,
just removing it from the model will set it to zero.  This
would be easy to automate if only one coefficient is the
problem.

Rodney