hi!!
   
  Below I have 4 columns vector of c and d which are unequal in length.These c and d have 2 columns each where these 2 columns represent an interval values. I easily get these overlapping interval values by using these code:
   
  s<-apply(c,1,rev)
aa<-apply(d,1,function(x)apply(s<=x,2,any))
   
  My huge problem is i need to do this detection using the loops and i'm seriously not good in doing that. I've tried to read the R manual but still failed to do so.  Can somebody help me as i'm a new user to R!! Thanks in advance..
   
             c                                   d
  17130612   17587118     17712302   18100404
17712302   18221688     21203780   21387314
21225764   21387314     25012714   30748348
25012714   30748348     33852816   34384588
33852816   34480192     34794536   35996440
36012944   36209144 
36252300   36280276
36737468   36971144
43693832   43878548

       
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