On Nov 18, 2011, at 7:04 PM, Trevor Davies wrote:
A late friday afternoon coding question. I'm having a hard time
thinking
of the correct search terms for what I want to do.
If I have a df like this:
a <-
data.frame(name=c(rep('a',10),rep('b',
15)),year=c(1971:1980,1971:1985),amount=1:25)
name year amount
1 a 1971 1
2 a 1972 2
3 a 1973 3
4 a 1974 4
5 a 1975 5
6 a 1976 6
7 a 1977 7
8 a 1978 8
9 a 1979 9
10 a 1980 10
11 b 1971 11
12 b 1972 12
13 b 1973 13
14 b 1974 14
15 b 1975 15
16 b 1976 16
17 b 1977 17
18 b 1978 18
19 b 1979 19
20 b 1980 20
21 b 1981 21
22 b 1982 22
23 b 1983 23
24 b 1984 24
25 b 1985 25
wide.a <- reshape(a , direction="wide", idvar="name", timevar="year")
names(wide.a) <- sub("amount", "x", names(wide.a) )
wide.a
# -------------------
name x.1971 x.1972 x.1973 x.1974 x.1975 x.1976 x.1977 x.1978 x.
1979 x.1980 x.1981 x.1982 x.1983 x.1984 x.1985
1 a 1 2 3 4 5 6 7 8
9 10 NA NA NA NA NA
11 b 11 12 13 14 15 16 17 18
19 20 21 22 23 24 25
>
and I'd like to reshape it so it is like this:
X.1971 X.1972 X.1973 X.1974 X.1975 X.1976 X.1977 X.1978 X.1979 X.1980
X.1981
a 1 2 3 4 5 6 7 8 9
10
NA
b 11 12 13 14 15 16 17 18 19
20
21
X.1982 X.1983 X.1984 X.1985
a NA NA NA NA
b 22 23 24 25
Thanks for the assist.
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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David Winsemius, MD
West Hartford, CT
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
