How to get all combinations between two character vectors?

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or even simpler
paste(rep(x,each=length(y)),y,sep="")

I like that one - it makes perfect sense. I might wrap it into a
function and use it.

Am 11.03.2011 12:44, schrieb Eik Vettorazzi:

Hi Rainer,
I don't know a function for literally substituting "THEFUNCTION", but
x <- c("a", "b")
y <- c("x", "y")
sort(levels(interaction(x,y,sep="")))

I remember the interaction function - but then ther is the trouble with
factors - and I am always trying to avoid those.

Thanks a lot,

Rainer

or

as.vector(t(outer(x,y,paste,sep="")))

will work. "sort" and "t" respectively here are used to produce the
desired order.
hth.


Am 11.03.2011 11:53, schrieb Rainer M Krug:

Hi

I know there is a function - I have used it before - but I always forget
what it is called...

I need the combination of two character vectors, i.e:

x <- c("a", "b")
y <- c("x", "y")

z <- THEFUNCTION(x, y)

z == c("ax", "ay", "bx", "by")

I promise I will write the name of the function on my desk!

Thanks,

Rainer

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