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 Curve fitting for a exp growth then exp decay		  New Topic  Reply to Topic
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jlit

United Kingdom
1 Posts
Posted - 03/13/2019 :  09:04:58 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin): Pro 2016 b9.3.2.303
Operating System: Windows 7

I'm trying to fit a single curve/model to a data set that usually follows a sudden exponential growth (over a few seconds) following by a slower exponential decay.

I was wondering if anyone could help me with a particular model to fit this in origin or if not to create the model.

YimingChen

1609 Posts
Posted - 03/13/2019 :  2:48:54 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

Would you please try this piecewise fit app?
https://www.originlab.com/FileExchange/details.aspx?fid=325

Thanks,
James
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jlit2

1 Posts
Posted - 03/29/2019 :  07:41:20 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi

Thanks for sending that but unfortunately I am limtied to 9.3 2016 version of origin and can't upgrade. Is there any other way to import this function? Can it be described and I'll add it?

Thanks
Jim
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Sam Fang

293 Posts
Posted - 04/01/2019 :  10:45:29 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Jim,

Origin 2016 provides a built-in fitting function ExpGrowDec in Exponential category. You can try it.

Thanks.
Sam
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