[R] rbind question

[Göran Broström]

On 8 Jul 2003, David Andel wrote:

> Hi
> 
> I am trying to replicate a vector in n rows for comparison purposes with 
> another matrix.
> 
> foo <- c(1,2,3)
> bar <- rbind(foo,foo) # does the trick for 2 rows
> bar <- rbind(rep(foo,2)) # does something else
> 
> How do I generate a matrix with all rows=foo without writing 'foo' n times as 
> arg?

Like this?

> foo <- c(1,2,3)
> n <- 5                                                           
> bar <- matrix(foo, nrow = n, ncol = length(foo), byrow = TRUE)
> bar
      [,1] [,2] [,3]
 [1,]    1    2    3
 [2,]    1    2    3
 [3,]    1    2    3
 [4,]    1    2    3
 [5,]    1    2    3

G.

> 
> Thanks,
> David
> 
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> 

-- 
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 Göran Broström                    tel: +46 90 786 5223
 Department of Statistics          fax: +46 90 786 6614
 Umeå University                   http://www.stat.umu.se/egna/gb/
 SE-90187 Umeå, Sweden             e-mail: gb at stat.umu.se