[BioC] help with flank()

[Vincent Carey]

it isn't clear to me that flank can do it directly.  but

 resize( shift(ir1, -50), width=71 )

does what you asked.



On Fri, Oct 15, 2010 at 7:48 PM, joseph <jdsandjd at yahoo.com> wrote:
> Hello
> I have an IRanges object ir1:
> ir1 <- IRanges(c(100,500), c(200,600))
>> ir1
> IRanges of length 2
>    start end width
> [1]   100 200   101
> [2]   500 600   101
>
> can you please show me how to use flank() to create a second IRanges object ir2
> with coordinates that are 50 upstream of ir1 'start' and 20 downstream of the
> same ir1 'start'?
>
> ir2 should look like this:
>    start end width
> [1]    50  120    71
> [2]    450 520    71
>
> Thanks
> joseph
>
>
>
>
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