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 Limits to Non-linear curve fitting		  New Topic  Reply to Topic
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dwearly

USA
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Posted - 10/24/2007 :  11:04:53 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Version (OriginPro 7.5G SR6):
Operating System: Win XP SP2

I have a non-linear curve fit that I would like to add constraints to the parameters. For example I always want one variable to be positive and another to be between 0 and 1. With the deviation of the results, the values lie within that range.

Thanks
Doug

minimax

348 Posts
Posted - 10/24/2007 :  11:32:08 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Doug,

Such constraints are available in non-linear curve fit tool.

Make sure your NLSF dialog is not in basic mode, then select Options menu - Constraints.

You can set lower/upper bounds for evry variable.

Moreover, you can also add general linear constraints.

Max
OriginLab Technical Support
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