[R] extract data from a column

[Nanami]

So if I am given some data that look like this:

> head(CTSS)
    V1     V2     V3                    V4   V5 V6  V7               
1 chr1 564563 564598 chr1:564588..564589,+ 1336  
2 chr1 564620 564649 chr1:564644..564645,+   94 
3 chr1 565369 565404 chr1:565371..565372,+  217  
4 chr1 565463 565541 chr1:565480..565481,+ 1214 
5 chr1 565653 565697 chr1:565662..565663,+ 1031  
6 chr1 565861 565922 chr1:565883..565884,+  316 

what I would like to do is to obtain two columns from column V4 like:
start_coord  stop_coord
564588        564589
564644        564645

I will try and see if it works what you suggested. 
Thank you,
Best,
Nanami




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