Origin Ver. and Service Release (Select Help-->About Origin): 8.5.1 Operating System: Windows 7
I am performing a 3rd order polynomial fit to my data and want the fit to pass through specific points. I can use the constraint tab and put my constraints there. If I have 2-3 constraints there, it works fine. Anymore and fitting is not converging with reasons unknown. Can you please tell me is there is any limit to number of linear constraints I can put in origin for a fitting function? I do not see any such limit anywhere in the documentations. I am using Origin 8.5.1 on windows 7.
If you have too many points that need to be passed through, maybe it's just impossible by 3rd order poly-line. Can you higher the poly order and try again?
Non linear fitting with constraints
Posted - 07/31/2014 : 2:03:25 PM
