[R] A matrix calculation

[Peter Dalgaard]

Bogaso wrote:
> No no, I actually want following result :
> 
> 7,   14,   21, 6,   13,   20, 5,   12,   19,............

c(t(mat[7:1,])) then.


> 
> 
> 
> 
> 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
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>
> 


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    O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
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