[R] A matrix calculation

[Bogaso]

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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> 

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