Hello List,

I know that Horae is no longer supported but I had quick question about the R-factor.

I search the mailing list and found this post from 2006 concerning different R-factors in the fit log

 I have a question about Artemis log file. I noticed that two r-factors are
> reported in the log file. One is in the fifth line and it is called
> 'R-factor'  and the other one is under the data set fitting conditions and
> it is called 'r-factor for this data set'. They have in general different
> values. What does it mean? Which is the difference between the two?

It probably means that I am calculating something wrongly.

Here's the concept.  If you do a multiple data set fit and you have
some value of R-factor, you would like to know how that misfit is
partitioned among the data sets.  That is, you'd like to know if one
set is contributing to the misfit for significantly than the others.

When Ifeffit computes the R-factor, it is for the entire fit.  My idea
in Artemis was to use the formula for R factor from page 18 of
   http://cars9.uchicago.edu/~newville/feffit/feffit.ps
on each data set in a multiple data set fit and report that in the log
file.

At some point, I must have convinced myself that I was doing the
calulcation in Artemis identically to how it is done in Ifeffit.  If
you are seeing different values, it would seem I was mistaken.

I'll make an entry in my to do list to look into that.

I am reviewing some older analysis projects from artemis and just wanted to know which R-factor more accurately describes the misfit? I suspect the average over the k weights values since this was adopted in Demeter?

Thanks,

Chris Patridge

--
********************************
Christopher J. Patridge, PhD
NRC Post Doctoral Research Associate
Naval Research Laboratory
Washington, DC 20375
Cell: 315-529-0501