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Ted13

1 Posts
Posted - 11/03/2014 :  8:16:10 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver 8.
Hello,
I want to find the radius of curvature of those two peeks.




thanks

JacquelineHe

287 Posts
Posted - 11/04/2014 :  04:06:50 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

I search and found the equation in wiki.
http://en.wikipedia.org/wiki/Radius_of_curvature_(mathematics)
Note: you need to copy-paste the above full link to open the page.

If this is what you want, you can calculate the first and second derivative values with our differentiate tool and use Set Column Value dialog to calculate the radius of curvature values according to the equation.

About Set Column Value dialog, please refer to this pages:
http://www.originlab.com/doc/Tutorials/SetColVal
http://www.originlab.com/Index.aspx?go=Support/VideoTutorials&pid=1166

Thanks
Jacqueline
OriginLab
Edited by - JacquelineHe on 11/04/2014 04:13:04 AM
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Hideo Fujii

USA
1582 Posts
Posted - 11/04/2014 :  3:58:09 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

Also, you may want to see this post as a related issue:

http://www.originlab.com/forum/topic.asp?TOPIC_ID=19115

It seems that your data needs to be applied some sort of smoothing before calculating the curvature.

--Hideo Fujii
OriginLab
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