[R] Separating columns, and sorting by rows

[RagingJim]

Dear anyone who knows more about R than me (so everyone). I have been bashing
my head on the keyboard all day trying to do something with my table.

I have some data, like so:
     yyyy-mm     Rainfall(mm)
1   1977-02        17.4
2   1977-03        34.0
3   1977-04        26.2
4   1977-05        42.6
5   1977-06        58.6
6   1977-07        23.2
7   1977-08        26.8
8   1977-09        48.4
9   1977-10        47.0
10  1977-11        37.2
11  1977-12        15.0
12  1978-01         2.6
13  1978-02         6.8
14  1978-03         9.0
15  1978-04        46.6

The data continues on for x number of hundreds of data points. Simply put, I
need to make that data.frame into this data.frame/table/matrix/grid/... you
get the picture.

         Jan  Feb  Mar ... etc
Year   Rain Rain Rain
Year   Rain Rain Rain
Year   Rain Rain Rain
Year   etc...
Year
Year

How on earth do I do it? I have made little to no progress on it all day.
Also, just like all the other problems, the year and month will change every
time depending upon which csv file or sql query I load into the program. If
anyone has any pointers, that would be awesome.

Cheers lads.
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