Subject: least squares fit

From: [email-masked] (Antonio Fernandez Ramos)
Date: Thu, 23 Mar 1995 12:59:29 +0100

Dear netters,
I am trying to do a non linear least squares fit, 
using a Marquardt type algoritm, but I need to restrict some
parameters to make my function behaves correctly.
Is available any program to constrain parameters to be positive?

Thanks.