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Table into a list

6 messages · thomas88, Rui Barradas, R. Michael Weylandt +1 more

Original
thomas88
# 
Hello,
I am looking for a way to transform an array into a list (or a string).
My array has two columns 1 and 2, and I would like to create a list of the
values.

Let's say I have :

       x1       x2
1      a          b
2      c          d
3      e          f 
4      g          h

What I would like to obtain is a,b,c,d,e,f,g,h.

I tried without success melt and reshape ( reshape(my_array,
direction="long", varying=1:2) ) but I cannot get it work.

Thanks a lot !!!
thomas

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R. Michael Weylandt
# 
Your question is not well formed: do you want a list or a string
(totally different things)? Or even more likely, a character vector?
What do you have now: is it really an array (=matrix) or is it the
data.frame it looks like?

If it's a matrix:

x <- matrix(letters[1:8], ncol = 2)
x <- as.vector(x) # Character Vector
paste(x, collapse = "") # String

If it's a data frame with factors:

x <- data.frame(matrix(letters[1:8], ncol = 2))
as.character(unlist(x)) # omit as.character() if you actually have
character elements and not factors.

Michael
On Fri, Feb 24, 2012 at 5:32 PM, thomas88 <thomas.coquet at free.fr> wrote:
R. Michael Weylandt
# 
My apologies: I missed the order of the desired output: the easiest
thing to do is likely to use the same techniques given below (and by
others in this thread) with a transpose t() before.

Michael

On Sat, Feb 25, 2012 at 2:05 AM, R. Michael Weylandt
<michael.weylandt at gmail.com> wrote: