[Ifeffit] "PCA not enabled" on Mac version of Demeter: Athena

Bruce Ravel bravel at bnl.gov
Fri Oct 3 14:01:36 CDT 2014


There is no a priori reason that PCA should not be available.  That 
said, Athena is careful to fail gracefully (i.e. with that message 
displayed) when it fails to find the bits that make PCA happen.

My guess is it's a packaging issue on MacPorts.  Let's ask Frank!


Are PDL and PDL::Stats dependencies for the Demeter package on MacPorts?

A quick perusal of the available ports at macports.org suggests that 
there may not be a package for PDL::Stats for the version of Perl you 
are using.  That seems rectifiable....


On 10/03/2014 02:50 PM, Ellen Daugherty wrote:
> Hello XAFS community,
> I recently upgraded to the new version of Demeter (0.9.20) for Mac and
> am trying to run principal components analysis on my spectra. When I
> click on "Principle components analysis" from the main menu, the window
> shows the following message:
> "PCA is not enabled on this computer.
> The most likely reason is that the perl modules PDL and/or PDL::Stats
> are not available."
> Perhaps the solution here is simple, but I am not familiar with perl
> modules and do not understand the source of the issue. I could not find
> information about this problem in the Mail Archive, though I may have
> missed something. Do I need to download the PDL perl modules separately
> from the Demeter installation? Could there be files that are not located
> in the proper directory? Or perhaps PCA is simply not available for Macs?
> Please let me know if further information would help in solving this
> problem.
> Thank you!
> Ellen
> --
> Graduate Student
> Research Assistant
> Department of Chemistry
> Colorado State University
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  Bruce Ravel  ------------------------------------ bravel at bnl.gov

  National Institute of Standards and Technology
  Synchrotron Science Group at NSLS --- Beamlines U7A, X24A, X23A2
  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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