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  tp4638675
  
2014 Jan 16
1
Doubt in simple merge
...Younger,by="ID", all=T)
Output I am expecting:
ID    age
ID1  38
ID2  35
ID3  31
ID4  29
ID5  21
It looks very simple.  But I need help.  
When I run the code it gives me age.x and age.y.
thank you
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