[Ifeffit] Re: Ifeffit Digest, Vol 40, Issue 10

Michel Jaouen Michel.Jaouen at univ-poitiers.fr
Wed Jun 21 12:40:07 CDT 2006

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>Today's Topics:
>    1. data file format (emmanuelle montarges-pelletier)
>    2. Re: data file format (Matthew)
>    3. Re: data file format (Bruce Ravel)
>    4. The most important fitting parameters (Bridget Ingham)
>Message: 1
>Date: Wed, 21 Jun 2006 10:25:47 +0200
>From: emmanuelle montarges-pelletier
>	<emmanuelle.montarges at ensg.inpl-nancy.fr>
>Subject: [Ifeffit] data file format
>To: ifeffit at millenia.cars.aps.anl.gov
>Message-ID: <1F268809-6D80-4EE8-996D-209DFF3FEE07 at ensg.inpl-nancy.fr>
>Content-Type: text/plain; charset=ISO-8859-1; delsp=yes; format=flowed
>I have some problems with data file format as I try to import exafs 
>files in Artemis or in Athena.
>I am working on a powerbook G4, with OSX 10.4.6. I installed the 
>ifeffit package, including Athena and Artemis.  Athena could open any 
>XAS "raw" file from fluorescence or transmission measurements. 
>However, if I perform any modifications on these raw files with 
>exterior programs (Michalowicz programs, Kaleidagraph)  and try to 
>import the new files , saved as text files, Athena or Arthemis can 
>not open them. I guess it may come from the encoding of the text 
>file. Do you have any clue on this encoding issue? Do you know any 
>program which would allow me to transform these text files in 
>readable files for Artemis?
>Thank you for your answer
>There are two types of encodings which may differ among text files from
>different countries and OSs.  I
>don't know how Athena&Co. handle either of them.  One is that numbers and
>decimals can differ per country.  If
>Kgraph is using a local encoding other than the American standard, say,
>using commas instead of periods, it's possible
>that Artemis won't understand it.  I have the same problem with my analysis
>programs.   Every so often I get a panicky email
>from a user whose files won't open.  The other variation is in what
>constitutes the end of a line, which is OS-dependent.  It could
>be carriage return, linefeed, or CR-LF.
>     mam
>Salut Emmanuelle,
>Matthew's suggestion of floats with commas is a good suggestion.  A&A
>make no attempt at respecting localization.  (That is, a number
>between one and two might be written as 1,234 -- which would confuse
>A&A -- rather than 1.234.)  If that is the case, your best bet is to
>go back to the exterior program and ask it nicely to write out points
>instead of commas.  Or you might need to edit the file by hand.
>I thought that the end-of-line issue (Matthew's other suggestion) was
>one that was solved in A&A years ago.  If that proves not to be the
>case, please let me know.
>Another possibility is that the exterior program added other text to
>the file that is confusing A&A.  Here is my explanation of how Athena
>reads ascii data files
>    http://cars9.uchicago.edu/iffwiki/FAQ/HoraeQuestions
>and here is the explanation of the file-reading function in Ifeffit
>which Athena uses:
>    http://cars9.uchicago.edu/~ifeffit/refman/node24.html
>The situation in Artemis is similar, although restricted in the sense
>that Artemis is expecting its data to be chi(k).
>If none of that clarifies the issue for you, I'll need to see an
>example of the data file which is causing the problem.
>The easiest way to move data from Athena to Artemis is to have Artemis
>import its data directly from the Athena project file.
>If there is some data processing feature that Athena does not do but
>which you require before moving on to data analysis, you should
>consider making a feature request here on the mailing list.  Athena
>will never get the features that you need if I am not aware that they
>are needed!

Just an additional point: take care to save the file as unix file and 
not standard Mac (use a free text editor as TextWrangler to do this 
kind of manipulation).



Michel Jaouen
Universite de Poitiers - UFR Sciences - SP2MI
Boulevard Pierre et Marie Curie - Teleport 2
BP 30179
86962 Futuroscope - Chasseneuil Cedex
Tel : (33) 5 49 49 67 37
Fax : (33) 5 49 49 66 92
e-mail : Michel.Jaouen at univ-poitiers.fr

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