On Oct 14, 2010, at 10:40 AM, David Winsemius wrote:
On Oct 14, 2010, at 10:31 AM, Maas James Dr (MED) wrote:
Sorry for the verbose example. I want to row bind two matrices,
and all works except I want the column labelled "row" to be
sequential in the new matrix, shown as "mat3" here, i.e. needs to
be 1:6 and not 1:3 repeated twice. Any suggestions?
cbind( row=1:sum(nrow(mat1),nrow(mat2)),
rbind(mat1[ ,-1],mat2[ ,-1])
)
NOte that using row as a column name could be a bit confusing down the
line for two reason: a) it's actually a column, and b) "row" is the
name of a useful function. In fact, that function could be used to
solve your request using your mat3 constructed below:
> mat3[ , 1] <- row(mat3)[ , 1]
> mat3
row ti counti
[1,] 1 7 9
[2,] 2 8 5
[3,] 3 7 9
[4,] 4 5 3
[5,] 5 6 8
[6,] 6 3 7
--
David.
Thanks
J
colnm1 <- c("row","ti","counti")
colnm2 <- c("row","tj","countj")
mat1 <- matrix(c(1,7,9,2,8,5,3,7,9),byrow=T,nrow=3)
colnames(mat1) <- colnm1
mat1
row ti counti
[1,] 1 7 9
[2,] 2 8 5
[3,] 3 7 9
mat2 <- matrix(c(1,5,3,2,6,8,3,3,7),byrow=T,nrow=3)
colnames(mat2) <- colnm2
mat2
row tj countj
[1,] 1 5 3
[2,] 2 6 8
[3,] 3 3 7
mat3 <- rbind(mat1,mat2)
mat3
row ti counti
[1,] 1 7 9
[2,] 2 8 5
[3,] 3 7 9
[4,] 1 5 3
[5,] 2 6 8
[6,] 3 3 7
===============================
Dr. Jim Maas
University of East Anglia
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David Winsemius, MD
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
