R help - Oct 2004 - Vector and String

Hi everybody,

I'm using a vector to strore some strings.

I create a vector named seq2 :
> seq2<-vector(length=0)
I have a string named b
> b
[1] CATGGTAGGAATAC

I put b in the vector
> seq2<-c(seq2,b)
Finally I edit seq2
> seq2
[1] "14760"

My question is why I obtained a number (14760) when I add a string
(CATGGTAGGAATAC)

I have an idea : when I edit b, I see ( [1] CATGGTAGGAATAC ) 
and not ([1] "CATGGTAGGAATAC") 

How can I convert b to a true string with "" 

Thank you very much

On Fri, 22 Oct 2004 pbrouilly at gphy.campus.univ-poitiers.fr wrote:
> Hi everybody,
> 
> I'm using a vector to strore some strings.
> 
> I create a vector named seq2 :
> > seq2<-vector(length=0)
> typeof(seq2)
[1] "logical"

so you created a *logical vector*.  See ?vector.
> I have a string named b
> > b
> [1] CATGGTAGGAATAC
I think you have a factor, not a `string'.  What does str(b) say?
> I put b in the vector
> > seq2<-c(seq2,b)
> 
> Finally I edit seq2
> > seq2
> [1] "14760"
> 
> My question is why I obtained a number (14760) when I add a string
(CATGGTAGGAATAC)
> 
> I have an idea : when I edit b, I see ( [1] CATGGTAGGAATAC ) 
> and not ([1] "CATGGTAGGAATAC") 
> 
> How can I convert b to a true string with "" 
seq2 <- character()
seq2 <- c(seq2, as.character(b))



-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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