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 How to edit nonlinear formula		  New Topic  Reply to Topic
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nadhra

Malaysia
2 Posts
Posted - 12/28/2010 :  10:03:09 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:

What should i do in order to edit the nonlinear formula that contained in the Originlab library. For example, I want to edit Hill formula to langmuir formula. Both of this formula have the similarities in numerator side but different in denominator side. Thank you for your attention

nadhra

Shirley_GZ

China
Posts
Posted - 12/29/2010 :  01:54:27 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Nadhra,

To edit a built-in function, you can duplicate it and then edit it in the Fitting Function Organizer.

Besides, you can quote a built-in function to define a user-defined function.

Shirley



Originlab Technical Service Team
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nadhra

Malaysia
2 Posts
Posted - 01/02/2011 :  03:48:52 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi shirley,
first of all, thanks for replying my message. But I meet the new prob. Every time I try to fit this equation I get a message stating my fitting function is not completed. The function that I already edit is:

y=Vmax*x*k/(1+x*k)

The parameters I have a values are x,y and Vmax. The value of k need to be determined from the curve fit.

Thank you again.



nadhra
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larry_lan

China
Posts
Posted - 01/03/2011 :  9:45:59 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi:

I think better to create a new user-defined fitting function. This tutorial may help.

Thanks
Larry
OriginLab
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cuongktv

Taiwan
3 Posts
Posted - 01/07/2011 :  06:04:42 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Dear friends,
I want to define a circular function in OriginLab, but finaly I got so much errors.
Could you please help me the code for circular function?
Thanks in advance!
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larry_lan

China
Posts
Posted - 01/09/2011 :  9:44:15 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi:

The circular is an implicit function? If so, we haven't support this feature in current version.

Thanks
Larry
OriginLab
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