Curve Fitting: Origin 8.6: Nonlinear Curve Fit Tool

[@luqing9161]

3:18 user defined function

[@Blendershick]

Very helpful! Thank you!

[@sachinchintapalli1823]

Thank you bhayya 🤩

[@johnzap1000]

Thank you very much

[@kajaljaglan9175]

how we can do fitting , if there are two independent variables in our equation, as we have in case of watts expression to extract neutron multuiplicity............in Origin 2019 b

[@1414gp]

please help can u tell me how to find the value of x for specified value of y for a smooth non linear curve

[@cappesoncinema]

you make a calibration curve, then "Data reader" function on the calibration curve

[@alienessadak4361]

How can i fix this error? I get this error everytime i try.
Which parameters? how can i simplifying the function?
Do I need to make any parameter in the function 1?
The error is:
-203
Fit did not converge, because mutual dependency exists between parameters.
The model is over-parameterized, so the fitter cannot find a fixed parameter value. Try simplifying the function, or fixing several parameter values.

[@TheOriginlab]

Hello Ali, Please read this documentation page : www.originlab.com/doc/Origin-Help/The_Reason_Why_Fail_to_Converge . If your problem still persists, please contact us at [e-mail] for further technical support.

[@apsariparvin7957]

Thank u

[@meriembouhbou6992]

Hello , and thx for this great video please how can we enter a new function having this form ( x1= fct (x0) ) knowing that we give a first value of ( x0) to find x1 and so on
( xn = fct(xn-1) ) , and i have to fit with it , thank you again :)