Jeff--sorry, I guess my grammar got a little convoluted. It DOES work
with norm(E) and deriv(E) fitting for me as well. It does NOT work
with chi(k) fitting for me.
--Scott Calvin
Faculty at Sarah Lawrence College
Currently on sabbatical at Stanford Synchrotron Radiation Laboratory
On Jan 7, 2011, at 7:58 PM, Jeff Terry wrote:
Did not try really hard to work with it.
Fitting Data as norm(E) from -20.000 to 30.000
Fit included 98 data points and 3 variables
R-factor = 0.000263
chi-square = 0.04347
reduced chi-square = 0.0004482
group weight
=======================================
2: Standard 1 1.000(0.000)
3: Standard 2 0.455(0.000)
group e0 shift
=======================================
2: Standard 1 -0.905( 0.000)
3: Standard 2 -0.905( 0.000)
On Jan 7, 2011, at 8:07 PM, Scott Calvin wrote:
Hi all,
Athena has been crashing for me during one particular linear
combination analysis, and I'm wondering if any of you have an
explanation. A project file which demonstrates the problem is
attached. I am using Athena 0.8.054 with ifeffit 1.2.10 on a
MacBook Pro using OS 10.5.8.
The behavior can be seen by trying to fit the Data group by using a
linear combination of Standard 1 and Standard 2 in chi(k). It gets
as far as "plotting in k-space from group 'Data'...done!' and then
hangs, with the watch icon remaining indefinitely. This doesn't
happen in norm(E) or deriv(E) fits, and doesn't happen when
Standard 1 is not used. But Standard 1 appears to have uncorrupted
chi(k) data when plotted directly. Standard 1 is from one of the
XDAC lines at NSLS, as are the standards that work.
I've tried saving Standard 1 and reading it in as a new group, but
no luck. I've also looked at the data in Standard 1, and I don't
see anything out of place, such as a place where the energy backs
up. I've tried starting the chi(k) file with zero values,
truncating the end values, and changing the background spline to
end at the same point the data does. And it always hangs at the
same point.
Any ideas? I'd like to use this data for a workshop next week!
--Scott Calvin
Faculty at Sarah Lawrence College
Currently on sabbatical at Stanford Synchrotron Radiation Laboratory
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Jeff Terry
Scott Calvin