[R] extract from data.frame (indexing)

[Nico Gutierrez]

Hi All,

I need to do the following operation:


  Year Amount Amount.1
1 2001    150      150
2 2002    120      120
3 2003    175      175
4 2004    160      160
5 2005    120      120
6 2006    105      105
7 2007    135      135

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