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 Fittnig plot - ask for help		  New Topic  Reply to Topic
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km1314

1 Posts
Posted - 04/12/2018 :  05:28:45 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hey, i'd like to know, how can I made plot fitting like at screenshoot (I draw needed fittnig in Paint ;)). I guess I should use Polynomial Fittnig, but how?

arstern

USA
237 Posts
Posted - 04/12/2018 :  09:15:56 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

You will want to use the NonLinear Fit Dialog. To Use the Nonlinear Fit Dialog Select your data in the worksheet and Select Analysis -> Fitting -> Nonlinear Curve Fit -> Open Dialog.

Please see tutorial on Nonlinear Fitting: https://www.originlab.com/doc/Tutorials/Fitting-NLFit-Basic

Under the Category Tab -> Select Polynomial
Under Function -> Choose the desired function type

You can also define your own nonlinear fitting function:
https://www.originlab.com/doc/Tutorials/UserDef-FitFunc

If you have Origin 2018, I recommend downloading and installing the Simple Fit App: https://www.originlab.com/fileExchange/details.aspx?fid=239

The Simple Fit app is a nice tool to use for simpler fitting functions.

Thanks
Aviel
OriginLab
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