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
 Prediction bands: find distance from estimate		  New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic Lock Topic Edit Topic Delete Topic New Topic Reply to Topic

rdelvill

Belgium
9 Posts
Posted - 04/23/2013 :  09:58:02 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin): 8.5
Operating System: Windows 7

Hello,

Given a linear regression equation y*= .... derived from a set of points a prediction interval for y is y*-E < y < y*+E where E is given by a fairly complicated formula not reproduced here.
Origin can plot the upper and lower limits of the prediction intervals but it is not clear where one can retrieve the parameter E used in the plot. Is there any ways to have it as an output of the calculation or to find it somewhere?

Thanks in advance
Edited by - rdelvill on 04/23/2013 11:26:56 AM

meili_yang

103 Posts
Posted - 04/23/2013 :  9:50:03 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

If you choose to plot the prediction band under "fitted curve plot" in the linear fit dialog, besides the parameter report sheet, you should get another sheet contains upper prediction values and lower prediction values by a given x. Subtract either upper or lower prediction value from fitted y value is the value of E by a given x.

E is a function of x. Here you can find the formula to calculate the function. http://www.originlab.com/www/helponline/Origin/en/UserGuide/Linear_Regression_Results.html


Meili
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