as.vector(t(mat[7:1,]))
On Aug 23, 2009, at 9:35 PM, David Winsemius wrote:
There is another "matrix" strategy that succeeds, although it is
clearly less economical that the transpose approach:
matrix(mat[7:1, ], ncol=nrow(mat), byrow=TRUE) # will transpose
the matrix
I offer this only
There is another "matrix" strategy that succeeds, although it is
clearly less economical that the transpose approach:
matrix(mat[7:1, ], ncol=nrow(mat), byrow=TRUE) # will transpose the
matrix
I offer this only as a reminder that the byrow= parameter is available
when appropriate.
--
The problem with David's proposal is revealed by:
mat[7:1,]
# [,1] [,2] [,3]
# [1,]7 14 21
# [2,]6 13 20
# [3,]5 12 19
# [4,]4 11 18
# [5,]3 10 17
# [6,]29 16
# [7,]18 15
which simply reverses the rows. Then:
c(
On Aug 23, 2009, at 2:53 PM, Bogaso wrote:
No no, I actually want following result :
7, 14, 21, 6, 13, 20, 5, 12, 19,
Ooops. That is what I thought you wanted, but I didn't check very
carefully, did I?
c(apply(mat[7:1,],1,I) )
# the I() function just returns "it
On Sun, Aug 23, 2009 at 8:53 PM, Bogaso wrote:
> No no, I actually want following result :
>
> 7, 14, 21, 6, 13, 20, 5, 12, 19,
How about this?
x = c()
for (i in 7:1) x = c(x,mat[i,])
Guess that would do the trick.
Best,
Michael
--
Michael Knudsen
micknud...@gmail.com
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]
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,]18
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,]18 15
[2,]29 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 t
I have suppose a matrix like that
> mat <- matrix(1:21, 7)
> mat
[,1] [,2] [,3]
[1,]18 15
[2,]29 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
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