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 creating a nonlinear fit		  New Topic  Reply to Topic
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user87

3 Posts
Posted - 03/08/2010 :  5:10:41 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hi, I'm new at Origin and I have pretty much no clue what's going on. I want to do a nonlinear fit for some data. I can pull up the graph so far. I have an equation with two variables, one independent, one dependent, and two fitting parameters. so im using the User-Defined Fitting Functions. i can enter most of the stuff without too umch difficulty, but once i write out my equation in the code builder, and press compile, an error occurs
#pragma warning(error : 15618)
#include <origin.h>

Could someone point me in the right direction? I'm having a hard time just understanding the terms used in the help section. I am pretty clueless with programming and I don't have a strong background in calculus...
thanks

larry_lan

China
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Posted - 03/08/2010 :  9:04:22 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi:

Maybe these tutorials can help? You can first read the User Defined Fitting Function using Origin C example. I can't comment on your question because I can't reproduce it without your code.

Thanks
Larry
OriginLab Technical Services
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user87

3 Posts
Posted - 03/09/2010 :  2:10:23 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
thanks! i was able to fit my data properly!
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