[R] Interweaving cell entries from 2 columns

[(Ted Harding)]

On 20-Aug-07 09:49:08, jenny wrote:
> Hi, how do I interweave 2 columns of data into a single column?  See
> illustration below. Thx-jenny I have 2 columns of data Col1   Col21    
>    2 3          45          6 7          89          10 I want to
> create
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Re-structuring your exmaple as received [please see to your mailer's
formating!] into what I think you may mean:

 
  Col1   Col2
     1      2
     3      4
     5      6
     7      8
     9     10
 
You haven't stated in what form these two columns are available to
you at the point where you want to "merge" them, so I'll give two
answers (there may be others, deending on the source of Col1 and
Col2).

1. Suppose they are two columns of a matrix M:

M
     c1 c2
[1,]  1  2
[2,]  3  4
[3,]  5  6
[4,]  7  8
[5,]  9 10

Then:

as.vector(t(M))
[1]  1  2  3  4  5  6  7  8  9 10


2. Suppose they are available as separate vectors Col1 and Col2:

as.vector(rbind(Col1,Col2))
[1]  1  2  3  4  5  6  7  8  9 10


Best wishes,
Ted.

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E-Mail: (Ted Harding) <Ted.Harding at manchester.ac.uk>
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Date: 20-Aug-07                                       Time: 12:27:54
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