The Origin Forum
File Exchange
Try Origin for Free
The Origin Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ | Send File to Tech support
Username:
 Password:
Save Password
Forgot your Password? | Admin Options

 All Forums
 Origin Forum
 Origin Forum
 Negative R-Square (COD) and neg. Adj. R-Square		  New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic Lock Topic Edit Topic Delete Topic New Topic Reply to Topic

DaKrippo

Germany
1 Posts
Posted - 07/17/2012 :  08:14:39 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin): 8
Operating System:WinXP

While fitting some data by means of a nonlinear Curve Fit (see image) it happened to me that the values of R-Square (COD) and Adj. R-Square became negative. Interestingly the R Value is said to be zero.
Could this be true or is this some kind of bug? If these values are correct, what do they mean or how can I interpret them? Is there really an advantage in considering the adj. R-Square instead of the normal one when comparing the goodness of a fit?

THX for the help,
Dan

easwar

USA
1964 Posts
Posted - 07/17/2012 :  12:39:10 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Dan,

See this help file page:
http://originlab.com/www/helponline/Origin/en/UserGuide/Goodness_of_Fit.html

Also, the R value may not have been displayed with enough precision? Your image is only partially visible, you could send your opj to tech support, use the link on top right of the page, and refer to this post in your message.

Easwar
OriginLab
Go to Top of Page
  Previous Topic Topic Next Topic Lock Topic Edit Topic Delete Topic New Topic Reply to Topic
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
The Origin Forum © 2020 Originlab Corporation Go To Top Of Page
Snitz Forums 2000