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ALBH

Albania
2 Posts
Posted - 06/08/2021 :  03:30:36 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin):
Operating System: I am trying to fit the activation energy from temperature dependence on origin with my own function which is y=1/(1+c*exp(-E/x)), but is not fitting at all. I need to extract the constant proportionality c and activation energy E.

A.Hoxha

YimingChen

1685 Posts
Posted - 06/08/2021 :  08:58:52 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
It's hard to tell why the fitting failed. It's very likely due to the initialization of fitting parameters. Please set c and E initial value close to it's true value.

James
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ALBH

Albania
2 Posts
Posted - 06/09/2021 :  04:28:49 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
I fixed it but I don't know what is wrong again, still no fitting

A.B
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YimingChen

1685 Posts
Posted - 06/09/2021 :  10:13:38 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Please share your project file using the link below:
https://www.originlab.com/restricted/support/index.aspx?c=3

James
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