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 Cos Sqr Fitting

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idonotexistKH Posted - 04/26/2023 : 12:46:23 AM
Hi, I am new to using Origin. I want to fit a graph to cos(theta)^2, but I am not sure as to how to write the equation to fit it. Could someone give me a step by step guide?

This is what I have done for now.
2   L A T E S T    R E P L I E S    (Newest First)
idonotexistKH Posted - 04/26/2023 : 9:27:21 PM
Sorry, I know how to input the fitting, I meant to ask how to write the equation, specifically the parameters. How do you determine that?
snowli Posted - 04/26/2023 : 09:09:54 AM
Please check if this tutorial helps
https://www.originlab.com/doc/tutorials/userdef-fitfunc


Thanks, Snow

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