Dear R Experts,
I have data in the following format
x1 x2 time
2 4 1
3 1 2
4 6 3
1 4 4
5 6 5
8 5 6
. . .
. . .
. . .
1 5 399
3 4 400
Time represents each month which simply has a number from 1 to 400
(i.e. the data covers 400 months). I would like to somehow create two
new variables which counts x1 and x2 as quarterly data in stead of
monthly. Like this:
x1 x1 Quarter
10 12 1
12 15 2
. . .
. . .
. . .
23 21 100
Can any one tell me how this can be done in R?
With kind regards,
Thomas Jensen
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