[BioC] Elementwise appending of List elements?

[Hervé Pagès]

Hi Ryan,

On 06/18/2014 11:33 AM, Ryan C. Thompson wrote:
> Hi all,
>
> I have 2 CharacterList objects (let's call them A and B) of equal
> length, and I want to append the each element of List A to the
> corresponding one in List B and get the resulting CharacterList. I can
> do this with mendoapply(c, A, B), but this is quite slow. Is there a
> function to do this quickly?

Code adapted from "junctions" method for GAlignmentPairs objects:

   library(GenomicAlignments)

   pcombine <- function(x, y)
   {
     stopifnot(length(x) == length(y))
     xy <- c(x, y)
     collate_subscript <-
       S4Vectors:::make_XYZxyz_to_XxYyZz_subscript(length(x))
     tmp <- xy[collate_subscript]
     GenomicAlignments:::shrinkByHalf(tmp)
   }

I'll add something like this to S4Vectors.

Cheers,
H.

>
> -Ryan
>
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-- 
Hervé Pagès

Program in Computational Biology
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