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reznichenka

Israel
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Posted - 08/16/2005 :  09:33:13 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Version (Select Help-->About Origin): 7.5
Operating System:xp
how i compare differences between 2 curves, but not if they fit to the same function,if they are different (I have 2 data sets of measurements with standart error of every measurement).
Thank you

easwar

USA
1964 Posts
Posted - 08/18/2005 :  10:33:45 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

There is a Fit Comparison tool in v7.5 that compares two datasets by fitting them with one function.

On our File Exchange area there is a tool that allows you to fit two different functions to a single dataset and compare the results:
http://www.originlab.com/FileExchange/details.aspx?fid=64

In both of the above, there is something in common - either the fitting function or the dataset. Thus it is possible to compute a p-valye/F-value etc to make a statistical statement comparing the two.

If I understand correctly, you have two datasets and you are fitting each with a different function. In such a case I am not sure if it is even possible in such a case to make a statistical statement comparing the two fits using p-/F-value, other than simply looking at the R-Sqr or Chi-Sqr values from each fit and making a qualitative statement such as "fit 1 seems to be better than fit 2"?

Easwar
OriginLab
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