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Alex Rivera
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I have a data frame of amino acid sites, and want to create a new data frame of each pairwise combination of these sites. The original data will look something like this: df<-cbind(letters[1:5], letters[6:10], letters[11:15]) df [,1] [,2] [,3] [1,] "a" "f" "k" [2,] "b" "g" "l" [3,] "c" "h" "m" [4,] "d" "i" "n" [5,] "e" "j" "o" And what I would like is this: newdf<-cbind(paste(df[,1],df[,2],sep=""),paste(df[,1],df[,3],sep=""),(paste(df[,2],df[,3],sep=""))) newdf [,1] [,2] [,3] [1,] "af" "ak" "fk" [2,] "bg" "bl" "gl" [3,] "ch" "cm" "hm" [4,] "di" "dn" "in" [5,] "ej" "eo" "jo" The actual data may have hundreds of rows and/or columns, so obviously I need a less manual way of doing this. Any help is much appreciated, I am but a humble biologist and my skill set in this area is rather limited.
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