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nbo10

USA
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Posted - 01/07/2009 :  10:24:16 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. 8 and SR (Select Help-->About Origin):
Operating System: xp

Hi,
I'm trying to fit a curve with two Voigt functions. I've tried copying the built in Voigt function into a user function but it doesn't compile. Can anyone offer some help.

VincentLiu

China
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Posted - 01/08/2009 :  04:43:25 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi John,

Compared to the user-defined functions, the Built-in functions in Origin 8 are using a different mechanism. So we suggest you to use the fitting function directly or if you want to access the built-in function in other function, you may follow the instructions below:

http://wiki.originlab.com/~originla/howto/index.php?title=QuickHelp:How_to_quote_a_built-in_function_when_defining_a_user-defined_function

If this cannot solve the problem, please state your questions with more details. You may send it through

http://www.originlab.com/www/company/qform.aspx?s=1&

Best regards,
Vincent Liu
OriginLab Technical Services
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larry_lan

China
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Posted - 01/08/2009 :  09:48:39 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
If you look into the function defination, you can see there is a "integ", which means integration here. However, "integ" is not a built-in function, and that's why you failed to compile it if you just copy+paste the function body.

Fitting with integration is somewhat complicated for user defined functions. Maybe you can read this first.
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