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PCA function doesn't respond

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2011-12-13
2013-02-26
  • Hi,

    I am trying to use the EPtoolkit to do PCA on Neuroscan average files. I have 3 groups and for each subject I have 3 files (3 conditions). The toolbox can read the files but how do I conduct PCA on the whole group of files, and not on individual files? It seems like currently I need to select a file before clicking on PCA.

    Thanks,
    - Muhammad

    but when I click PCA, after setting the parameters for PCA, it doesn't respond. The Matlab window doesn't show that Matlab is 'busy' and I get the following message:

      

     
  • Please disregard the last two lines in the earlier message (below my signature). Sorry about the confusion.

     
  • Joe Dien
    Joe Dien
    2012-06-18

    Just in case this would be helpful for anyone else, here is the response I sent Muhammad back in December:

    When you use single file mode, it merges all the files into a single file.  It will be listed as a single file on the PCA pane, which you will then need to click on to select if for the PCA.  The Toolkit requires that PCA be conducted with a single file.  You'll need to merge files one way or another before you can do a PCA with them.  You can also use the Edit function to combine files.