| T O P I C R E V I E W |
| NickChang |
Posted - 01/05/2023 : 03:23:15 AM
Origin Ver. and Service Release (Select Help-->About Origin):
Operating System: How to set the nonlinear constraint in nonlinear curve fitting? for example:y=(a1*b1+a2*b2*x^2)/(a1*b1) nonlinear constraint:as x=0 a1*b1=2.I don't know whether this kind of operation can be done in Origin? |
| 2 L A T E S T R E P L I E S (Newest First) |
| aplotnikov |
Posted - 01/05/2023 : 11:24:42 AM
You cannot estimate paired values (a_i, b_i) where i={1,2} separately using the given formula. |
| YimingChen |
Posted - 01/05/2023 : 08:49:40 AM
Origin doesn't support nonlinear constraints. But in this case, can you simply replace b1 with 2/a1 in the fitting function?
James |
