[R] strsplit and forward slash '/'

[Federico Calboli]

On 3 Aug 2011, at 17:46, Sarah Goslee wrote:

> 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?

yes!

Thanks

Federico


> 
> 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

--
Federico C. F. Calboli
Department of Epidemiology and Biostatistics
Imperial College, St. Mary's Campus
Norfolk Place, London W2 1PG

Tel +44 (0)20 75941602   Fax +44 (0)20 75943193

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