[R] Create a vector from matrix.

[Dimitris Rizopoulos]

try this:

s1 <- letters[1:10]
e <- LETTERS[1:10]
q <- c("a","a","c","b","d","d","a","e","b","a")

e[match(q, s1)]


I hope it helps.

Best,
Dimitris


patricia garcía gonzález wrote:
> Hi all, 
> 
> I am trying to create a vector with the information contained in a determined matrix. Let me explain myself. I have a vector like this:
> 
>         q <- c("a","a","c","b","d","d","a","e","b","a")
> 
> And a matrix like:
> 
>         s1 <- c("a","b","c","d","e","f","g","h","i","j")
>         e <- c("A","B","C","D","E","F","G","H","I","J")
>         s <- cbind( e, s1 )
> 
> 
> The matrix s contains the correspondences between vector q and e. And I want a vector of elements of vector e, but in the order of q. The result should be like:
> 
>         q <-  c ("a","a","c","b","d","d","a","e","b","a")
> 
>         res<-c ("A","A","C","B","D","E","A","E","B","A")
> 
> So I have to take the elements of vector e and make a matching with elements in vector q. Any idea?Sorry If I didn't explain myself well.
> 
> Thanks
> 
> Patricia
> 
> 
> 
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-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus Medical Center

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