| T O P I C R E V I E W |
| Tasoscave |
Posted - 08/02/2017 : 03:55:25 AM
Hi, I am trying to fit a simple power curve in a 2-stage data set.
The data are composed from two stages which means I need to fit a power fir curve twice.
The first curve (1st stage) has a perfect match.
However, the second (2nd stage) is not converging and I need to normalize the data back to zero in order to have a good fit.
Any help will be much appreciated
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| 2 L A T E S T R E P L I E S (Newest First) |
| Hideo Fujii |
Posted - 08/02/2017 : 09:41:45 AM
Hi Tasoscave,
> I need to normalize the data back to zero in order to have a good fit.
You are using Allometric1 function which doesn't have the bias terms. Have you tried Power0 function
(under Power category) which has both X and Y biases (xc and y0)? You can normalize the data by
subtracting these values later, if you need.
--Hideo Fujii
OriginLab |
| AmandaLu |
Posted - 08/02/2017 : 06:51:28 AM
Hi,
Please send your data to tech@originlab.com. Maybe the initial values are not good so the fit did not converge.
Thanks,
Amanda
OriginLab Technical Service
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