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 for Programming
 Forum for Origin C
 Display Parameter Init Values-Fitting		  New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic Lock Topic Edit Topic Delete Topic New Topic Reply to Topic

Hegmafor

6 Posts
Posted - 05/20/2010 :  6:22:46 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hello,

this is quite a basic question.
After looking into how the fitting algorithm for a damped sine extracts the start values I still have some questions regarding the procedure.
Therefore I would like to plot the yy=log(...) data and the corresponding linear fit in the parameter init code.
Actually the yy data should be a nice line if no noise is present but with noise (which crosses zero) due to the log the data should be far from linear and therefore the linear fir should not yield good results.
Surprisingly it does, which is nice but I would like to understand why.

I think the plotting is done in one or two rows if you know how to do it.
Thank you for your help. I am curious about this for quite a while now and hope to get an answer.

MIke

larry_lan

China
Posts
Posted - 05/20/2010 :  9:39:28 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Mike:

I am not quite sure what's your problem. Could you please show me your data and source code, and describe your question in detail?

Thanks
Larry
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