| T O P I C R E V I E W |
| Chao |
Posted - 08/28/2005 : 2:51:17 PM
Origin Version (Select Help-->About Origin): 7
Operating System: XP
When I do statistical weighting for a fit:
does it mean that the higher my y-value, the more it is taken into consideration into the fit? i have exp. decaying data and i want that it puts more weight into the early (large) y-values as they have less error.
Thanks |
| 1 L A T E S T R E P L I E S (Newest First) |
| easwar |
Posted - 08/29/2005 : 11:33:05 AM
Hi,
I presume you are referring to the weighting methods in NLSF tool. These are documented in the Help file in the section:
Before you Start: The Chi-Square Minimization
As you can see from that help section, when you pick statistical weighting the weight is computed as (1/y-value), thus larger the y value less the weight.
You can pick other methods, including direct, where you can use a custom dataset for weight where you specify what value to use for each data point.
Easwar
OriginLab
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