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 How to make equations from fitted data

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T O P I C    R E V I E W
orginchem Posted - 10/06/2013 : 03:38:49 AM
orgin pro 8.1 SR3

I have a exponential scattered plot which i fitted using Gadgets>Quick Fit> Expdecay with offset after that i got a exponentially fitted data with some parameters like this.

y0 = 2.52926, x0 = 0.56547
A1 = 0.1482, t1 = 5.39919

How can i relate this parameters to a equation? i found two equations in exponential decay, expdec1 (y = y0 + Ae - x / t ) and expdec2( http://www.originlab.com/www/helponline/origin/en/images/math/d/b/e/dbe9a439a7822f8017f12dda9923ec9d.png). Which expdec function should i use to derive equations from fitted data.

Advance thanks for your help

Super cool
1   L A T E S T    R E P L I E S    (Newest First)
orginchem Posted - 10/11/2013 : 10:31:17 AM
quote:
Originally posted by Christyli

Hi orginchem,
The right equation is y = y0 + A1^exp(-(x-xo)/t1)
When doing quite fits under Gadgets, you can refer to the equation by follow the steps:
1. With the graph active, click the triangle button at the right upper corner of the yellow ROI box. Select Preference in the fly-out menu.
2. Go to Label Box tab and select Show Parameter Name besides the Equation.
3. select Fit Curve tab in the Quick Fit Preference dialog and select Output Fit Curve to Source Sheet. Click OK button.
4. Back to the graph and click the triangle button again. Select New Output.
5. A table with the equation included will appear on the graph




Thanks Christyli it worked

Super cool

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