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 ERFC function for non linear curve fitting		  New Topic  Reply to Topic
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Nasir

Sweden
1 Posts
Posted - 12/08/2020 :  03:20:58 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
I am using origin for non linear curve fitting for CO2 breakthrough data. My equation includes the ERFC function. Whenever I tried it says "cannot converge, reason unknown".
Please help me if you know how to do it in origin.
Thanks in advance

YimingChen

1658 Posts
Posted - 12/08/2020 :  09:19:59 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Nasir,

If the function definition is correct, you may need to tune the initial values of parameters. Other reasons could be:
https://www.originlab.com/doc/Origin-Help/The_Reason_Why_Fail_to_Converge

If you would like us to check, please send your data and fitting function to <tech@originlab.com>, also please provide your serial number. Thank you.

James
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