[R] repeating a dataframe n times in the direction of the rows

[Peter Dalgaard BSA]

Wolfram Fischer <wolfram at fischer-zim.ch> writes:

> Question:
>     How can a repeat a dataframe n times 
>     in the direction of the rows?
>     (Or: How I can rbind a dataframe n times ?)
> 
> 
> Example Data:
>     x <- data.frame( alpha=letters[1:3], num=1:3 )
>     n <- 4
> 
> 
> Complicated solution: To rbind a dataframe n times I can program a loop:
> 
>     xr <- x
>     for( i in 2:n ) xr <- rbind( xr, n )
> 
> 
> Observation: To cbind a dataframe n times I can use rep:
> 
>     xc <- data.frame( rep( x, n ) )
> 
> 
> Is there a similar possibility to repeat in the direction of the rows?

How about

x[rep(1:nrow(x),n),]

?
-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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