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 No xyz surface fit with error		  New Topic  Reply to Topic
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rdax

United Kingdom
10 Posts
Posted - 01/30/2024 :  12:32:27 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
This origin help page https://www.originlab.com/doc/Quick-Help/Fit-Surface-WithErr explains how to do a nonlinear surface fitting of xyz,w with error bars. I am unable to see the error/weighting. I tried plotting an xyz and xyz with error bar plot and executing the fits on each of those but the results were identical, so the error bars are definitely not automatically being taken into account. I have xyz data with z error, I'd like to take the z error into account when doing the fitting analysis. The graph would be nice but this is not 100% necessary --- fitting straight out of the workbook to generate the report sheets would suffice.

Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 2024 (64-bit) SR1
10.1.0.178 (Home-use)

Operating System: Windows

snowli

USA
1398 Posts
Posted - 01/30/2024 :  3:27:32 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hello,

Please double check if you did
step 1: move your 3D surface function you desired out of the Surface Fitting category to User Defined category in Fitting Function Organizer

step 2: open Nonlinear Curve Fit toolinstead of Nonlinear surface fit tool.

Thanks, Snow
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