[R] strsplit and forward slash '/'

[Sarah Goslee]

Hi Federico,

A forward slash isn't a special character:

> strsplit("T/T", "/")
[[1]]
[1] "T" "T"

so there's some other problem.

Are you sure that your first column contains strings and not factors?
What does str(my.data) tell you?

Does
strsplit(as.character(my.data[1,1]), "/")
work?

If you used read.table() to get your data in, you might want the
as.is=TRUE or the stringsAsFactors=FALSE argument.

Sarah

On Wed, Aug 3, 2011 at 12:37 PM, Federico Calboli
<f.calboli at imperial.ac.uk> wrote:
> Hi All,
>
> is there a way of using strsplit with a forward slash '/' as the splitting point?
>
> For data such as:
>
> 1      T/T    C/C  16/33
> 2      T/T    C/C  33/36
> 3      T/T    C/C  16/34
> 4      T/T    C/C  16/31
> 5      C/C    C/C  28/29
> 6      T/T    C/C  16/34
>
> strsplit(my.data[1,1], "/") # and any variation thereof
> Error in strsplit(apoe[1, 1], "/") : non-character argument
>
> Any advice will be gratefully received.
>
> Best wishes,
>
> Federico
>
>


-- 
Sarah Goslee
http://www.sarahgoslee.com