[R] list?

[Marc Schwartz]

on 09/15/2008 08:46 PM Paulo Cardoso wrote:
> Hi,
> 
> How the data bellow was obtained? What object is tN?
> 
>> tN
> 
>  1  2  3  4  5  6  7  8 10 11 12 
>  6 13 10 16 19 12 11  8  2  2  1
> 
> str(tN)
>  'table' int [, 1:11] 6 13 10 16 19 12 11 8 2 2 ...
>  - attr(*, "dimnames")=List of 1
>   ..$ : chr [1:11] "1" "2" "3" "4" ...
> 
> I'd like to do the same with another data.
> 
> Thanks,
> 
> Paulo

See ?table

N <- rep(c(1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12),
         c(6, 13, 10, 16, 19, 12, 11, 8, 2, 2, 1))

> N
  [1]  1  1  1  1  1  1  2  2  2  2  2  2  2  2  2  2  2  2  2  3  3  3
 [23]  3  3  3  3  3  3  3  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4
 [45]  4  5  5  5  5  5  5  5  5  5  5  5  5  5  5  5  5  5  5  5  6  6
 [67]  6  6  6  6  6  6  6  6  6  6  7  7  7  7  7  7  7  7  7  7  7  8
 [89]  8  8  8  8  8  8  8 10 10 11 11 12


tN <- table(N)

> tN
N
 1  2  3  4  5  6  7  8 10 11 12
 6 13 10 16 19 12 11  8  2  2  1

> class(tN)
[1] "table"

> str(tN)
 'table' int [, 1:11] 6 13 10 16 19 12 11 8 2 2 ...
 - attr(*, "dimnames")=List of 1
  ..$ N: chr [1:11] "1" "2" "3" "4" ...


HTH,

Marc Schwartz