[R] Inserting a subsequence between values of a vector

[Chris Stubben]

You could use a combination of rle, cumsum and append.

> x <- c(1,1,1,2,2,3,3,3,3,3,4) 
> y<-rle(x)$lengths
> y
[1] 3 2 5 1
> z<-cumsum(y)[y>1]
> z
[1]  3  5 10
>
> for(i in rev(z)) x <- append(x, c(0,0,0), after = i)
> x
 [1] 1 1 1 0 0 0 2 2 0 0 0 3 3 3 3 3 0 0 0 4


Chris


Serguei Kaniovski-3 wrote:
> 
> 
> Hallo,
> 
> suppose I have a vector:
> 
> x <- c(1,1,1,2,2,3,3,3,3,3,4)
> 
> How can I generate a vector/sequence in which a fixed number of zeroes
> (say
> 3) is inserted between the consecutive values, so I get
> 
> 1,1,1,0,0,0,2,2,0,0,0,3,3,3,3,3,0,0,0,4
> 
> thanks a lot,
> Serguei
> 	[[alternative HTML version deleted]]
> 
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