Dear R users:

I have a quick question:

is there any way to get a subset of a data frame with the ordered indexes or without these indexes?

example:

mydata<- data.frame(A=seq(1,10), B=c(-5,2,-4,6,-8,-9,2,5,7,0))
subset(mydata, B>0)
  A B
2 2 2
4 4 6
7 7 2
8 8 5
9 9 7

I would like to obtain this:

  A B
1 2 2
2 4 6
3 7 2
4 8 5
5 9 7

or this

  A B
  2 2
  4 6
  7 2
  8 5
  9 7

I think this is possible but I dont know how...
any sugestion?
thanks

jose silva
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