pick up the values

Hi,

I have a list of data, e.g. r[[i]]
r[[1]]=
1      2
1      6
5      5
5.5   3
r[[2]]=
4    6
3    5
7    8
3    5
?
r[[500]].
In the first column, the selected values should like this:
(the later value)-(the former value)>=1
In the second column, the selected values should like this:
(the former value)-(the later value)>=1.
The outputs are:
For r[[1]]
[1,1]  1, [3,1]  5, 
[1,2]  2
For r[[2]]
[1,1]  4, [3,1]  7
[1,2]  6, [2,1]  5
?
r[[500]].
I have no idea what kind of functions can be used in this process. Could you
help me? Thank you very much.


--
View this message in context: http://r.789695.n4.nabble.com/pick-up-the-values-tp4603277.html
Sent from the R help mailing list archive at Nabble.com.