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Haris
United Kingdom
1 Posts |
 Posted - 09/08/2016 : 09:24:20 AM
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Origin Ver. and Service Release (Select Help-->About Origin):
Operating System:
I have a very simple problem. I want to extrapolate the line from the same data set which has two different slopes and find out where they intercept in the x-axis. (i.e. the graph levels off- I want to intercept the point at which it starts to level off).
Many thanks
Haris
HK |
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Chris D
428 Posts |
Posted - 09/08/2016 : 09:46:18 AM
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Hi,
If you have Origin 2016 and wish to do it via the user interface, we have an Onset Of Slope App (http://www.originlab.com/fileExchange/details.aspx?fid=288) that does exactly what you want to do easily. Note- the App only works with Origin 2016 and future versions that have yet to be released.
If you are not using Origin 2016, you can download a demo here:
http://www.originlab.com/demodownload.aspx
Thanks,
Chris Drozdowski
Originlab Technical Support
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Edited by - Chris D on 09/08/2016 09:47:27 AM |
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Hideo Fujii
USA
1582 Posts |
Posted - 09/08/2016 : 10:12:47 AM
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Hi Haris,
Yes, Chris's approach works when you already have the fitted line for the second region. Additionally,
if it is before having the fitted line there, you can try non-linear curve fitting with a piecewise function
(Category=Piecewise, Function=PWL2); then you get the slopes and intercepts of both regions (the
derived parameter, "a2" is the intercept of the second region).
Hope this hints additionally.
--Hideo Fujii
OriginLab |
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Extrapolated and intercept x value