Hello Alex,
There are two options in the LCF page that may help. If you don’t want any
negative values try selecting “All weights between 0 and 1” and unselecting
“Force weights to sum to 1”.
Matt
From: Ifeffit On Behalf Of
Alexander Zherebker
Sent: Wednesday, January 24, 2024 7:35 AM
To:
Hi Soyoung,
On Fri, Oct 8, 2021 at 5:29 PM Soyoung Kim wrote:
> I see. Thank you for the quick reply.
>
> But would it be difficult to program it so that it will export properly,
> e.g., with multiple energy axes?
>
Sorry for the slight delay, and I have two answers here:
In general, it
" But would it be difficult to program it so that it will export properly,
e.g., with multiple energy axes?"
- that is what saving as unique files means.
---
Anatoly I. Frenkel
Professor
Department of Materials Science and Chemical
I see. Thank you for the quick reply.
But would it be difficult to program it so that it will export properly,
e.g., with multiple energy axes? Because when the data is plotted as a
graph, it is hard to tell whether or not the x-axes are the same... And if
you are processing data from someone
It is not a bug. When groups have unique energy axes they should be saved in
different files.
Anatoly
> On Oct 8, 2021, at 6:19 PM, Soyoung Kim wrote:
>
>
> Dear Bruce and IFEFFIT community,
>
> Hope all is well. I found a bug with Athena's file export function. I had two
> normalized
Sunil,
You are correct. Athena does not save settings from the LCF tool. That's not
so much a bug as it is a missing feature.
It's on my to do list (there's a link to the to do list on the Demeter home
page). I am hoping to make a new release next month ... I will try to address
this
...@millenia.cars.aps.anl.gov
[mailto:ifeffit-boun...@millenia.cars.aps.anl.gov] On Behalf
Of Scott Calvin
Sent: Friday, November 20, 2009 12:48 AM
To: XAFS Analysis using Ifeffit
Subject: Re: [Ifeffit] Bug in Athena?
On Nov 19, 2009, at 2:59 PM, Matt Newville wrote:
For this case, wouldn't it be better to measure
symmetry? ;)
Carlo
On Thu, 19 Nov 2009, Zajac, Dariusz A. wrote:
Dear Bruce, Dear All,
maybe it is a naïve question but I want to ask and to point this problem...
Windows XP. Athena 0.8.059
Sc.Linux. Athena 0.8.060
I have a set of data with refernces (one sample, many scans). I have
should we break symmetry? ;)
darek
-Original Message-
From: ifeffit-boun...@millenia.cars.aps.anl.gov
[mailto:ifeffit-boun...@millenia.cars.aps.anl.gov] On Behalf
Of Carlo Segre
Sent: Thursday, November 19, 2009 3:35 PM
To: XAFS Analysis using Ifeffit
Subject: Re: [Ifeffit] Bug
Is there ever a case where a merged reference channel is useful?
I thought the only possible use for a reference channel was for
comparing individual scans. That is, prior to merging.
--Matt
On Thu, Nov 19, 2009 at 6:45 AM, Zajac, Dariusz A.
dariusz.za...@desy.de wrote:
Dear Bruce, Dear All,
Hi Matt:
I agree. It is useful to have the reference channel from the first of the
merged data pulled over as reference for the merged data but this
actuallly only makes sense if the user first aligned using the reference.
carlo
On Thu, 19 Nov 2009, Matt Newville wrote:
Is there ever a
Hi Matt,
I'm the one who requested the merged reference channel.
If the data is ideal, of course only one reference scan is needed. But
there are two common ways it can be nonideal that are relevant:
1) The monochromator does not hold calibration; i.e. there is an
energy shift between
There are a few questions all mixed together here.
Why does Athena make a merge of references? As Matt points out, that is
an odd thing to do. I decided I wanted some kind of reference channel
tied to the merged spectrum so that I could take merged data from
different project files and
Hi Bruce,
On Nov 19, 2009, at 11:48 AM, Bruce Ravel wrote:
Why does Athena make a merge of references? As Matt points out,
that is
an odd thing to do.
I may be confused as to what we're talking about. Why is this an odd
thing to do? It seems perfectly normal to me to want the reference
On Thursday 19 November 2009 01:48:49 pm Scott Calvin wrote:
Why does Athena make a merge of references? As Matt points out,
that is
an odd thing to do.
I may be confused as to what we're talking about. Why is this an odd
thing to do? It seems perfectly normal to me to want the
Hi Scott
On Thu, Nov 19, 2009 at 9:50 AM, Scott Calvin scal...@slc.edu wrote:
Hi Matt,
I'm the one who requested the merged reference channel.
If the data is ideal, of course only one reference scan is needed. But there
are two common ways it can be nonideal that are relevant:
1) The
Yay!
Anatoly
From: ifeffit-boun...@millenia.cars.aps.anl.gov on behalf of Matt Newville
Sent: Thu 11/19/2009 2:59 PM
To: XAFS Analysis using Ifeffit
Subject: Re: [Ifeffit] Bug in Athena?
Hi Scott
On Thu, Nov 19, 2009 at 9:50 AM, Scott
--Matt
PS: I think that means I agree with Anatoly!
Me too! :-)
I like the side-effect of merging the reference when the spectra are merged.
However, it is the spectra that I merge rather than the refs. The refs can be
cleaner for alignment though for samples with small edges.
Adam
On Nov 19, 2009, at 2:59 PM, Matt Newville wrote:
For this case, wouldn't it be better to measure the reference
separately to determine the chemical shift, and not rely on the
reference channel for this purpose?
How often is the reference channel both noisy AND improved by merging?
That
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