If your df contains your data, try tmp <- cbind( paste(df[ ,1], df[ ,2], sep=":"), paste(df[ ,3], df[ ,4], sep=":") ) tmp <- t( apply(tmp, 1, sort) )
out <- data.frame( do.call(rbind, strsplit( tmp[,1], split=":" )), do.call(rbind, strsplit( tmp[,2], split=":" )) ) colnames(out) <- colnames(df) out Regards, Adai On Wed, 2006-06-14 at 16:35 +0100, yohannes alazar wrote: > First I would really like to thank the mailing list for help I got in the > past, as a new to R I am really needing some support on hoe to code the > following problem. > > > > I am trying to sort some data I have in a big file. The file has 4 columns > and 19000 rows. An example of it looks like this:- > > > > G 0.892 A 0.108 > > G 0.883 T 0.117 > > T 0.5 C 0.5 > > A 0.617 G 0.383 > > G 0.925 A 0.075 > > A 0.967 G 0.033 > > C 0.883 T 0.117 > > C 0.633 T 0.367 > > G 0.95 A 0.05 > > C 0.742 G 0.258 > > G 0.875 T 0.125 > > T 0.167 C 0.833 > > C 0.792 A 0.208 > > > > Columns one and three are alphabets while three and four are their > corresponding values. > > I wanted to sort this data so that my first and third columns are in > alphabetic order. For example in the first row the order is "G" then "A". > This is not in alphabetic order therefore we swap them along with their > values and it becomes: > > A 0.108 G 0.892 > > Row two looks fine but row three needs the same rearrangement as row one. > And the final out put looks like: > > A 0.108 G 0.892 > > G 0.883 T 0.117 > > C 0.5 T 0.5 > > A 0.617 G 0.383 > > A 0.075 G 0.925 > > A 0.967 G 0.033 > > C 0.883 T 0.117 > > C 0.633 T 0.367 > > A 0.05 G 0.95 > > C 0.742 G 0.258 > > G 0.875 T 0.125 > > C 0.833 T 0.167 > > A 0.208 C 0.792 > > Please some help with the relevant command names or a technique to code this > task. > > Thank you in advance > > Regards Hannes > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html