[Ifeffit] Import Error

Clark Adam Hugh (PSI) adam.clark at psi.ch
Fri Apr 5 09:33:42 CDT 2019


Dear Bruce and Lucy

Thanks for your work around Lucy, it works perfectly but still doesn't explain the behavior I am observing. 

Bruce what other information would be useful to diagnose the problem I am currently having? I have attached two figures, one showing the import window with the setting I have been using, specifically that I am not using the rebin feature. The second figure shows the difference in the pre-edge region between importing the data with eV and keV units for the energy column to demonstrate clearly that resampling is occurring when importing with data that has an energy column of KeV. 

Many Thanks
Adam Clark

__________________________________________
Paul Scherrer Institut 
Adam Hugh Clark
WLGA/129
Forschungsstrasse 111
5232 Villigen PSI
Schweiz

Telefon: +41 56 310 41 51
E-Mail: adam.clark at psi.ch
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Today's Topics:

   1. Data Import Bug (Athena 0.9.26) (Clark Adam Hugh (PSI))
   2. Re: Data Import Bug (Athena 0.9.26) (Ravel, Bruce)
   3. Re: Data Import Bug (Athena 0.9.26) (Lucy M Mottram)


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Message: 1
Date: Fri, 5 Apr 2019 11:33:13 +0000
From: "Clark Adam Hugh (PSI)" <adam.clark at psi.ch>
To: "ifeffit at millenia.cars.aps.anl.gov"
	<ifeffit at millenia.cars.aps.anl.gov>
Subject: [Ifeffit] Data Import Bug (Athena 0.9.26)
Message-ID:
	<BDFF4FC62383D24DA3EF530480A33EA70B616536 at MBX214.d.ethz.ch>
Content-Type: text/plain; charset="us-ascii"

Dear Mailing List

I have recently come across a data import error when using Athena version 0.9.26. When importing data there appears to be a resampling which significantly reduces the resolution of the data. Attached is an example dataset with an energy step of 0.5 eV on the Cu K edge. When importing with Athena 0.9.26 this data is significantly resampled resulting in an energy resolution on the edge of 1.5 eV which can either be seen by plotting or by exporting and inspecting the datafile. Using version 0.9.25 resolves this issue entirely. The data itself appears to actually be visible correctly during the import process (the import tab shows the data listed correctly when choosing which columns to import).

Is there a setting somewhere within Athena 0.9.26 that sets the default behavior to resample the imported data?

Thanks
Adam Clark

__________________________________________
Paul Scherrer Institut
Adam Hugh Clark
WLGA/129
Forschungsstrasse 111
5232 Villigen PSI
Schweiz

Telefon: +41 56 310 41 51
E-Mail: adam.clark at psi.ch
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Message: 2
Date: Fri, 5 Apr 2019 12:18:01 +0000
From: "Ravel, Bruce" <bravel at bnl.gov>
To: "ifeffit at millenia.cars.aps.anl.gov"
	<ifeffit at millenia.cars.aps.anl.gov>
Subject: Re: [Ifeffit] Data Import Bug (Athena 0.9.26)
Message-ID: <83c1d066-e0dc-9c37-6d9c-ca806d641c7d at bnl.gov>
Content-Type: text/plain; charset="Windows-1252"


Unfortunately, I don't observe what you are describing.

Grasping at straws here, but are you inadvertently using this import feature?

 
http://bruceravel.github.io/demeter/documents/Athena/import/preproc.html#rebinning-quick-scan-data

B

On 04/05/2019 07:33 AM, Clark Adam Hugh (PSI) wrote:
> Dear Mailing List
> 
> I have recently come across a data import error when using Athena 
> version 0.9.26. When importing data there appears to be a resampling 
> which significantly reduces the resolution of the data. Attached is an 
> example dataset with an energy step of 0.5 eV on the Cu K edge. When 
> importing with Athena 0.9.26 this data is significantly resampled 
> resulting in an energy resolution on the edge of 1.5 eV which can 
> either be seen by plotting or by exporting and inspecting the 
> datafile. Using version 0.9.25 resolves this issue entirely. The data 
> itself appears to actually be visible correctly during the import 
> process (the import tab shows the data listed correctly when choosing which columns to import).
> 
> Is there a setting somewhere within Athena 0.9.26 that sets the 
> default behavior to resample the imported data?
> 
> Thanks
> 
> Adam Clark
> 
> __________________________________________
> Paul Scherrer Institut
> Adam Hugh Clark
> WLGA/129
> Forschungsstrasse 111
> 5232 Villigen PSI
> Schweiz
> 
> Telefon: +41 56 310 41 51
> E-Mail: adam.clark at psi.ch
> 
> 
> 
> _______________________________________________
> Ifeffit mailing list
> Ifeffit at millenia.cars.aps.anl.gov
> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit
> Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit
> 


--
  Bruce Ravel  ------------------------------------ bravel at bnl.gov

  National Institute of Standards and Technology
  Synchrotron Science Group at NSLS-II
  Lead Beamline Scientist, 6BM (BMM)
  Building 743, Room 114
  Upton NY, 11973

  Homepage:    http://bruceravel.github.io/home/
  Beamline:    https://www.bnl.gov/ps/beamlines/beamline.php?r=6-BM
  Software:    https://github.com/bruceravel
  Demeter:     http://bruceravel.github.io/demeter/



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Message: 3
Date: Fri, 5 Apr 2019 14:18:58 +0100
From: Lucy M Mottram <lmmottram1 at sheffield.ac.uk>
To: XAFS Analysis using Ifeffit <ifeffit at millenia.cars.aps.anl.gov>
Subject: Re: [Ifeffit] Data Import Bug (Athena 0.9.26)
Message-ID:
	<CAJ7D-QF6+DZ8QjXG-4L1Gj4NrzuEoVauTkT0AnLERJkymrMZ-w at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Dear Adam and Mailing List,

I've checked and found some of my data has a similar problem, I don't know how to solve this using settings in Athena, however as a workaround I have found that if I convert the energy in my raw data file from KeV to Ev before importing it into Athena (using excel) it appears that re-sampling issue does not occur. Hopefully that helps in the short term and gives a clue to what is going wrong with the import.

All the best
Lucy Mottram

On Fri, 5 Apr 2019 at 12:35, Clark Adam Hugh (PSI) <adam.clark at psi.ch>
wrote:

> Dear Mailing List
>
>
>
> I have recently come across a data import error when using Athena 
> version 0.9.26. When importing data there appears to be a resampling 
> which significantly reduces the resolution of the data. Attached is an 
> example dataset with an energy step of 0.5 eV on the Cu K edge. When 
> importing with Athena 0.9.26 this data is significantly resampled 
> resulting in an energy resolution on the edge of 1.5 eV which can 
> either be seen by plotting or by exporting and inspecting the 
> datafile. Using version 0.9.25 resolves this issue entirely. The data 
> itself appears to actually be visible correctly during the import 
> process (the import tab shows the data listed correctly when choosing which columns to import).
>
>
>
> Is there a setting somewhere within Athena 0.9.26 that sets the 
> default behavior to resample the imported data?
>
>
>
> Thanks
>
> Adam Clark
>
>
>
> __________________________________________
> Paul Scherrer Institut
> Adam Hugh Clark
> WLGA/129
> Forschungsstrasse 111
> 5232 Villigen PSI
> Schweiz
>
> Telefon: +41 56 310 41 51
> E-Mail: adam.clark at psi.ch
> _______________________________________________
> Ifeffit mailing list
> Ifeffit at 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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