[R] A matrix calculation
Bogaso
bogaso.christofer at gmail.com
Sun Aug 23 20:53:38 CEST 2009
No no, I actually want following result :
7, 14, 21, 6, 13, 20, 5, 12, 19,............
David Winsemius wrote:
>
>
> On Aug 23, 2009, at 2:37 PM, Bogaso wrote:
>
>>
>> I have suppose a matrix like that
>>
>>> mat <- matrix(1:21, 7)
>>> mat
>> [,1] [,2] [,3]
>> [1,] 1 8 15
>> [2,] 2 9 16
>> [3,] 3 10 17
>> [4,] 4 11 18
>> [5,] 5 12 19
>> [6,] 6 13 20
>> [7,] 7 14 21
>>
>>> From this matrix, I want to create a vector like tha :
>>
>> c(mat[7,], mat[6,], mat[5,], ....., mat[1,])
>>
>> Can anyone please guide me, how to do that?
>
> c( mat[7:1,] )
>
> # [1] 7 6 5 4 3 2 1 14 13 12 11 10 9 8 21 20 19 18 17 16 15
>
> --
>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
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