[R] Combine by columns a vector with another vector that is constant across rows

Gabor Grothendieck ggrothend|eck @end|ng |rom gm@||@com
Tue Jul 3 16:46:19 CEST 2018

Try Reduce:

  Reduce(cbind, vec, 1:5)

On Tue, Jul 3, 2018 at 9:28 AM, Viechtbauer, Wolfgang (SP)
<wolfgang.viechtbauer using maastrichtuniversity.nl> wrote:
> Hi All,
> I have one vector that I want to combine with another vector and that other vector should be the same for every row in the combined matrix. This obviously does not work:
> vec <- c(2,4,3)
> cbind(1:5, vec)
> This does, but requires me to specify the correct value for 'n' in replicate():
> cbind(1:5, t(replicate(5, vec)))
> Other ways that do not require this are:
> t(sapply(1:5, function(x) c(x, vec)))
> do.call(rbind, lapply(1:5, function(x) c(x, vec)))
> t(mapply(c, 1:5, MoreArgs=list(vec)))
> I wonder if there is a simpler / more efficient way of doing this.
> Best,
> Wolfgang
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