[R] mussy data

[Gavin Simpson]

On Sat, 2007-10-20 at 18:15 +0700, Sandra Stattman wrote:
> Hi, I am writing my B.SC thesis and I have to do something in R, my data are
> 
> i    index    id    x
> 1    1    1    0.2
> 2    2    1    0.4
> 3    3    1    0.3
> 4    1    2    0.5
> 5    2    2    0.3
> 6    3    2    0.1
> 7    1    3    0.2
> 8    2    3    0.1
> 9    3    3    0.4
> 
> and for the analysis they have to be as
> 
> i    index    id    x
> 1    1    1    0.2
> 4    1    2    0.5
> 7    1    3    0.2
> 2    2    1    0.4
> 5    2    2    0.3
> 8    2    3    0.1
> 3    3    1    0.3
> 6    3    2    0.1
> 9    3    3    0.4
> 
> Thank you for your help!

?order

> dat
  i index id   x
1 1     1  1 0.2
2 2     2  1 0.4
3 3     3  1 0.3
4 4     1  2 0.5
5 5     2  2 0.3
6 6     3  2 0.1
7 7     1  3 0.2
8 8     2  3 0.1
9 9     3  3 0.4
> ord <- order(dat$index, dat$id)
> dat[ord, ]
  i index id   x
1 1     1  1 0.2
4 4     1  2 0.5
7 7     1  3 0.2
2 2     2  1 0.4
5 5     2  2 0.3
8 8     2  3 0.1
3 3     3  1 0.3
6 6     3  2 0.1
9 9     3  3 0.4

HTH

G

> Sandra
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 Gavin Simpson                 [t] +44 (0)20 7679 0522
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