R help - Mar 2014 - How to join data.frames with different row lengths

Hello,

I need to combine two data sets into one. For example:

Dataset1:
Code   Cap04
2        120
6          75
7        220
17         4

Dataset2:
Code   Cap08
2        120
7        112
9        190
17         4


I need the dataset to look like the following where it keeps every unique
'code' from both datasets and fills the blanks in both rows with 0:

FinalDataSet:
Code   Cap04   Cap08
2         120       120
6          75          0
7         220       112
9            0       190
17          4          4

Can anyone help me with this please?

Thank you very much!
Johnson

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