[R] data managment

[Adaikalavan Ramasamy]

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]]
> 
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