[Ifeffit] Plucking issue in the deglitching

Bruce Ravel bravel at bnl.gov
Fri May 22 08:23:03 CDT 2015

On 05/21/2015 09:31 PM, Shoaib Muhammad wrote:
> Dear all,
> I am using Demeter Athena 0.9.21 on Windows 8.1 x64. Recently I measured
> some XAS data in which there are some glitches. Somehow pluck tool is
> working very inaccurate for me during deglitching. I can’t select the
> point where I click, so I have to remove several points in order to get
> rid of one point. I have attached a short screen cast video along with
> sample XAS dataset in which I am trying to remove a point from pre-edge
> for demo purpose.

Hi Shoaib,

You are indeed correct -- there is a mistake made in interpreting the 
point clicked upon when using the deglitching tool.  The problem has to 
do with the deglitching tool not using the energy shift value correctly 
when interpreting the point clicked upon.

I will shortly be checking a fix into github and this fix will appear in 
the next version of the Windows installer.

The short-term work-around is to set the energy shift to 0, go do your 
deglitching, then rest the energy shift to the original value.  In your 
case, change the energy shift from 2.767 to 0, then go to the 
deglitching tool, then restore the value of 2.767 back on the main 
window.  Like all work-arounds, that's a bit of a pain in backside, but 
it will allow to make progress.

Thanks for the bug report.  As I often say here on the mailing list, 
useful bug reports here on the mailing list help make the software 
better for everyone!


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

  National Institute of Standards and Technology
  Synchrotron Science Group at NSLS-II
  Building 535A
  Upton NY, 11973

  Homepage:    http://bruceravel.github.io/home/
  Software:    https://github.com/bruceravel
  Demeter:     http://bruceravel.github.io/demeter/

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