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Heckisack
9 Posts |
 Posted - 02/18/2011 : 09:44:08 AM
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Hi,
i have a problem concerning Origin Version 6 and 8.
We are using a non-linear function for fitting curves. The formula for this fit looks like this:
if(T>b5+p*b6){
V=(bm1+bm2*(T-(b5)))*(1-0.0894*ln(1+p/(bm3*exp(-bm4*(T-b5)))));
}
else{
V=(bs1+bs2*(T-b5))*(1-0.0894*ln(1+p/(bs3*exp(-bs4*(T-b5)))))+b7*exp(b8*(T-b5)-b9*p);
};
The problem is that this formula, which worked in Origin 6 doesn't work in Origin 8. The fit only process the "if" part of the formula, the "else" part isn't considered.
Does anyone have a idea on how i have to change the formula to make it work with Origin 8?
Your help would be strongly appreciated,
Regards,
Tobias |
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larry_lan
China
Posts |
Posted - 02/22/2011 : 04:13:18 AM
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What's your function type?
Maybe you can send you FDF file in Origin 6 and a sample dataset to origin technical support?
Thanks
Larry
OriginLab |
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Heckisack
9 Posts |
Posted - 03/29/2011 : 08:24:24 AM
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Thank you for your answer, i was quite busy for the last weeks.
I just sent the Fit-Function and a dataset to the technical support, i hope there is a solution for my problem. |
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Heckisack
9 Posts |
Posted - 11/14/2014 : 07:17:07 AM
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Hello,
i tried to use this formula again (yes, it has been a long time) and i still cn only process the "if" part. Unfortunately i didn't receive an answer the last time i contacted the technical support, maybe someone can help me out? I need to process my data...
Kind regards,
Tobias |
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Topic |
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Fit Function Origin 6 vs 8