I have used mrqmin to fit a cosinus function to given data. My problem is with the fase parameter. I would like to limit the values of the fitting of this parameter to 0-360, but I don't know if this condition will bother the actual algorithm, or where to include it.
Thankyou!.

I am trying to do the exact same thing but don't know how. Can anyone help?

see the following link

http://www.numerical-recipes.com/forum/showthread.php?threadid=179