Bruce,
thanks for the info..
When referring to the Edge Step feature you mentioned that:
"You can type in a number, as before"
This does not appear to be working, if I check "Fix Step", enter a value into the edge step window, and then recompute the background, the value of the edge step reverts back to the automatic value.
Dave
> -----Original Message-----
> From: ifeffit-bounces(a)millenia.cars.aps.anl.gov
> [mailto:ifeffit-bounces@millenia.cars.aps.anl.gov] On Behalf
> Of Bruce Ravel
> Sent: Thursday, June 02, 2005 3:00 PM
> To: XAFS Analysis using Ifeffit
> Subject: Re: [Ifeffit] Importance and Edge Step
>
>
> On Thursday 02 June 2005 13:06, Barton, David (DG) wrote:
> > I noticed two new features in Athena 0.8.040 and am unsure
> of how to
> > use them. The new features are "Importance" and "Edge Step". I
> > attempted to use the Edge Step feature by checking "Fix
> Step" and then
> > entering a value, but the Edge Step always reverts back to the
> > automated value. However, when I use the Increase/Decrease buttons
> > (Left/Right arrow in Edge Step
> > window) the edge step does change, but it only changes in
> increments of
> > 0.01 which is much too large for my datasets. Is there
> something I am
> > missing here?
> >
> > Also, I couldn't locate Bruce's changelog for Athena so I
> am unsure of
> > what the new "Importance" feature does. Anyone used this
> new feature
> > yet?
>
>
> Importance:
> This number is used only in a merge and only when the
> "Weight by importance"
> button in the Merge menu is checked. It's intention is to allow
> user-specified weights in a merge. If you trust one data
> set twice as much
> as another, the more trusted one might be given an
> importance of 2 while the
> other is given an importance of 1. This was in response to
> a feature
> request -- personally I am not clear how would know how to
> weight different
> data sets.
>
> Edge step:
> I got a request for a quick way to play around with the
> size of the edge
> step. When the "fix step" button is checked, you can then
> specify an edge
> step which will then be used to normalize the data. You
> can type in a
> number, as before, or you can tweak the edge step up or
> down. You can set
> the size of the tweak in the preferences using
> bkg->step_increment. Note
> that if the "fix step" button is not checked, the edge step will be
> recomputed every time the background is recalculated.
>
> And I do need to be more conscientious about updating the
> change logs. Sorry.
>
> B
>
> --
> Bruce Ravel ----------------------------------- bravel(a)anl.gov -or-
>
> ravel(a)phys.washington.edu Environmental Research Division,
> Building 203, Room E-165
> Argonne National Laboratory phone and voice mail:
> (1) 630 252 5033
> Argonne IL 60439, USA fax:
> (1) 630 252 9793
>
> My homepage: http://feff.phys.washington.edu/~ravel
> EXAFS software:
> http://feff.phys.washington.edu/> ~ravel/software/exafs/
>
>
>
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