Thanks for the response! For clarification, I'm not really trying to re-normalize the normalized data, which is flattened in this case. However, I'm having (terminal) difficulty extracting the EXAFS from the normalized groups, because I can't seem to get the program to pass a spline through it (even though the spline will pretty much be a straight line) and gimme my EXAFS!
All caution will of course be applied in the use of said EXAFS, if I can get that far...! Cheers, thanks again, Mike > On Oct 15, 2016, at 1:25 PM, Anatoly Frenkel <anatoly.fren...@stonybrook.edu> > wrote: > > I would try to rename .norm by .xmu and see if it will be able to do what you > want. > I would still be cautious doing it because .norm means that the raw data was > already altered (pre-edge function was subtrated and slope changed). > Doing anything like that is possible but not wise because it is not > guaranteed that you would obtain the same result as when you start from the > raw data directly. > > For example, suppose "norm1" is normalization operation with one set of > parameters, and "norm2" - with another. Xmu is the raw absorption coefficient > data (obtained from the ratio of detector signals). > It is not likely that norm2 (xmu) will give the same results as > norm2(norm1(xmu)), although the differences may be small. That is the reason, > I think, Athena does not allow any ex post factum normalization to the > normalized data. > > Anatoly Frenkel > Stony Brook University > > >> On Oct 15, 2016 4:10 PM, "Mike Massey" <mmas...@gmail.com> wrote: >> Hi everyone, >> >> >> Apologies if this has been covered before, I'm just getting around to >> upgrading to Demeter. I have a bunch of old project files with a mishmash of >> data from different sources, and I'm having trouble getting them to work >> fully with the new software. >> >> Any group with a data type of "xmu" (energy space) seems to work as >> expected, but any group with a data type of "norm" (normalized data) doesn't >> seem to work properly when it comes to spline or post-edge background >> subtraction (which is handy if I want to do LCF, for example). Is this a bug >> or a feature? Has anybody yet developed a workaround? >> >> Any thoughts or advice would be greatly appreciated. The ultimate workaround >> is to use different data, but I'd like to use existing projects if possible >> (saves a lot of time and brain damage). >> >> >> Cheers, and thanks! >> >> >> Mike >> >> >> >> >> >> _______________________________________________ >> Ifeffit mailing list >> Ifeffit@millenia.cars.aps.anl.gov >> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit >> Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit > _______________________________________________ > Ifeffit mailing list > Ifeffit@millenia.cars.aps.anl.gov > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit
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