[R] Re move repeated values

kathie kathryn.lord2000 at gmail.com
Wed Oct 8 21:12:19 CEST 2008

Dear R users,

I'd like to make this data

	rem.y = c(-1,0,2,4,5)


	y = c(-1,-1,0,2,2,2,2,4,4,5,5,5,5,5).

That is, I need to remove repeated values.

Here is my code, but I don't think it is efficient.  How could I improve

y = c(-1,-1,0,2,2,2,2,4,4,5,5,5,5,5)

for (i in 1:n)          # removed same values in y
	imsi = 0
	if (i==1) {rem.y = y[i]}
	else {c = length(rem.y)
	      for (j in 1:c) { if (y[i]==rem.y[j]) imsi=1 }
	      if (imsi==0) rem.y = c(rem.y,y[i])}


Any suggestion will be greatly appreciated.


Kathryn Lord 
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