R help - Dec 2013 - Splitting a vector

Hi, I am quite new to R so I know that this probably is very basic , but how
can I split a sequence of number into multiple parts with equal length?
For example I have a vector

X=c(1:12)
I simply need to split it into sub-vectors with the same length N . Say N=3
then I need the output to be like 
1 2 3
4 5 6
7 8 9
10 11 12

And better if the sub-vectors can be named so that I can use them later for
individual study, probably a do-loop in which a function can be applied to
them.
I just want them to be in consecutive order so really no fancy conditions
here.  

Any helps to this amateur is greatly appreciated,
Long



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Hi,
Try:
split(X,as.numeric(gl(length(X),3,length(X))))
A.K.


Hi, I am quite new to R so I know that this probably is very basic , but how can
I split a sequence of number into multiple parts with equal
length? 
For example I have a vector 

X=c(1:12) 
I simply need to split it into sub-vectors with the same length N . Say N=3 then
I need the output to be like
1 2 3 
4 5 6 
7 8 9 
10 11 12 

And better if the sub-vectors can be named so that I can use 
them later for individual study, probably a do-loop in which a function 
can be applied to them. 
I just want them to be in consecutive order so really no fancy conditions here.
?

Any helps to this amateur is greatly appreciated, 
Long

You don't need to wrap 1:12 in c().

 Since matrices are just folded vectors, you can convert vector X to a matrix
Xm:

Xm <- matrix( X, nrow=3 )

and access columns to get your your sub-vectors:

Xm[,1]
Xm[,2]

and so on.

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Long Vo <long_vo_hai at yahoo.com.vn> wrote:
>Hi, I am quite new to R so I know that this probably is very basic ,
>but how
>can I split a sequence of number into multiple parts with equal length?
>For example I have a vector
>
>X=c(1:12)
>I simply need to split it into sub-vectors with the same length N . Say
>N=3
>then I need the output to be like 
>1 2 3
>4 5 6
>7 8 9
>10 11 12
>
>And better if the sub-vectors can be named so that I can use them later
>for
>individual study, probably a do-loop in which a function can be applied
>to
>them.
>I just want them to be in consecutive order so really no fancy
>conditions
>here.  
>
>Any helps to this amateur is greatly appreciated,
>Long
>
>
>
>--
>View this message in context:
>http://r.789695.n4.nabble.com/Splitting-a-vector-tp4681930.html
>Sent from the R help mailing list archive at Nabble.com.
>
>______________________________________________
>R-help at r-project.org mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
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>and provide commented, minimal, self-contained, reproducible code.