CHANGES IN VERSION 1.15.1
	o plotVar function updated

CHANGES IN VERSION 1.9.1
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NEW FEATURES

    o new function topVar

CHANGES IN VERSION 1.7.1
-------------------------

NEW FEATURES

    o mcia will return pairwise RV coefficient in the "$mcoa"
    o updated reference

CHANGES IN VERSION 1.6.2
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BUG FIXES

    o fix bug: update plotVar function - if input data set do not have any common ID, the id can not be identified by the function.