On Sep 2, 2011, at 9:30 AM, David Winsemius wrote:
On Sep 2, 2011, at 8:34 AM, Joao Fadista wrote:
Dear all,
I would like to know how to merge columns like:
Input file:
V1 V2 V3 V4 V5 V6
1 G A G G G G
2 A A G A A G
Looked like an mapply-type problem:
> with(dat,
mapply(paste,
list(V1, V3, V5),
list(V2, V4, V6),
MoreArgs=list(sep="/") )
)
There is a further refinement that is possible that will result in
naming of the columns made possible by the behavior of the USE.NAMES
feature of mapply. From the help page: "use names if the first ...
argument has names, or if it is a character vector, use that character
vector as the names";
with(dat, mapply(paste,
list(V1 =V1, V2=V3, V3=V5),
list(V2, V4, V6),
MoreArgs=list(sep="/") ) )
V1 V2 V3
[1,] "G/A" "G/G" "G/G"
[2,] "A/A" "G/A" "A/G"
[,1] [,2] [,3]
[1,] "G/A" "G/G" "G/G"
[2,] "A/A" "G/A" "A/G"
Desired output file:
V1 V2 V3
1 G/A G/G G/G
2 A/A G/A A/G
So for every 2 consecutive columns merge their content into one.
Thanks in advance.
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--
David Winsemius, MD
West Hartford, CT
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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.
