Re-sending: Setting a range for variables

[Pedro Castro Menezes Xavier de Mello e Silva]

I'm resending as a member of the list now.

Cheers,

Pedro
-----------

Hello there,

I'm trying to solve a system of 5 nonlinear equations with 5 variables 
with octave, but the results are rubbish. I would like to set limits, 
such as "x(1) must be smaller than 0" (x(1) is one of the unknowns) so 
that the solver don't produce x(1) = 2 as an answer, for instance.

Is there a way to do it using fsolve? I'm googling it for more than 2 
hours with no success.

Thanks in advance,

Pedro