Changes in version 1.4 (2016-03-02)                   

    o   The summarization function now uses "pca" method as default

                         Changes in version 1.3                         

    o   Added the "max" summarization function according to reviewer's advice. It may give a better result for some datasets.

                  Changes in version 1.2 (2015-09-25)                   

    o   Fixed a problem in the NAMESPACE file

                         Changes in version 1.1                         

    o   Added in the output percentage of rows in each category and warning if the percentage is too small or large for one category

    o   The function manual also includes some suggestion on this topic

                         Changes in version 1.0                         

    o   First official release