T O P I C R E V I E W 
carmenritu 
Posted  06/14/2012 : 04:59:18 AM Hello. I want to adjust a formula that it isn't in Origin function.
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I defined the fitting function as follows (2 parameters A and B): y=(1(x/A))^(B) For the initial estimation of the values I used A= 52 and B=3, I think that these values are suitable. I tried to fit the following values: I tried to run the nonlinear curve fitting but the fitting parameter are unreasonable, there is even no fitting curve on the result graph. Thanks for any help. 
2 L A T E S T R E P L I E S (Newest First) 
carmenritu 
Posted  06/14/2012 : 10:18:57 AM Thanks to your help! I solved my problem 
Sam Fang 
Posted  06/14/2012 : 06:25:55 AM You can choose initial estimation as A=53, B=3. And the fitting will succeed.
Because you choose A=52, and the last point's x is also 52,then (1x/A)^(B) for x=52 will be infinite.
Sam OriginLab Technical Services 

