Re: [Ifeffit] Import Error

I did not remember when you asked the other day, but it occurred to me that your data-in-keV problem was reported a few months ago. https://millenia.cars.aps.anl.gov/pipermail/ifeffit/2019-January/009688.html I have not yet made a new Windows release with the fix. However, it is not too hard to apply the fix by editing a small amount of Athena's source code. I think this is the easiest way to explain the small changes. Find the file "lib/Demeter/Data.pm" underneath the location on your computer that the software was installed. Look at this link: https://github.com/bruceravel/demeter/commit/1b586b88d36336cad00b13d73913ebd... Make the indicated change at line 22 (i.e. add $EPSILON6 to the argument list of qw().) Make the indicated changes around 885 (i.e. add the two lines before the while block and alter the argument of the greater-than comparison in the first line of the while block). The change at line 871 is irrelevant and has no impact on Athena's operations. That should do it. You can then drop the edited file into place on any other computer. B On 04/05/2019 10:33 AM, Clark Adam Hugh (PSI) wrote:

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@psi.ch -----Original Message----- From: Ifeffit On Behalf Of ifeffit-request@millenia.cars.aps.anl.gov Sent: Freitag, 5. April 2019 15:20 To: ifeffit@millenia.cars.aps.anl.gov Subject: Ifeffit Digest, Vol 194, Issue 4

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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)" To: "ifeffit@millenia.cars.aps.anl.gov" Subject: [Ifeffit] Data Import Bug (Athena 0.9.26) Message-ID: 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@psi.ch