[R] ordering a matrix by multiple columns

Michael Dondrup Michael.Dondrup at Genetik.Uni-Bielefeld.DE
Mon Mar 18 19:08:10 CET 2002

Dear all,

is there an easy way to sort or get the order of a matrix or data.frame
by multiple rows 
(like ODER BY in SQL), that means if some values in the first column are
equal, then sort them (or 'order') by the second etc.? 

Thanks in advance!
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