[R] reverse order of matrix rows

Adaikalavan Ramasamy ramasamy at cancer.org.uk
Tue Aug 9 02:04:59 CEST 2005


How about simply 

	mat <- mat[ nrow(mat):1, ]

Regards, Adai



On Mon, 2005-08-08 at 19:44 -0400, Jean Eid wrote:
> sapply(nrow(matrix):1, function(x) matrix[x,])
> 
> 
> 
> On Mon, 8 Aug 2005, Jake wrote:
> 
> > Quick question:  how can I reverse the order of the rows in a matrix?
> > i.e. make the last row first and the first row last, etc.?
> >
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> 
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