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 ExpDec1 and ExpGro1 functions		  New Topic  Reply to Topic
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DJ6

USA
2 Posts
Posted - 05/26/2020 :  9:41:57 PM  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: OriginPro 2020 STudent Version 64-bit

Can someone explain why my derived parameter (k) is positive when I use the ExpDec1 function and negative when I use the ExpGro1 function? Shouldn't it be the other way around?

Shirley_GZ

China
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Posted - 05/27/2020 :  05:15:18 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi DJ6,

Yes, the derived parameter k will be different for these two functions function, because there is a minus sign in ExpDec1 but ExpGro1 hasn't.

You can refer to these help pages:
https://www.originlab.com/doc/Origin-Help/ExpDec1-FitFunc
https://www.originlab.com/doc/Origin-Help/ExpGro1-FitFunc

If you mean other things or have any other questions, please feel free to let me know.

Thanks,
Shirley
OriginLab


Originlab Technical Service Team
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DJ6

USA
2 Posts
Posted - 05/27/2020 :  09:15:05 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Thanks Shirley!

In this case, if I were to extrapolate a depuration constant from using ExpDec1 as my function and k as the value representing that constant, should my depuration constant be negative or remain positive?
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