Message-ID: <CAAmySGO5Jke-KkdThUvpn456o0n4aDUg2j3TX6eRWATuo=CDEw@mail.gmail.com>
Date: 2011-10-05T16:17:29Z
From: R. Michael Weylandt
Subject: Populate a matrix
In-Reply-To: <A0C20390AF37844A9E2C783C9C268D8C496566EEB4@CCD1XM1101.ccd1.root4.net>
matrix(rep(y, each=length(x)), nrow=length(y), byrow=TRUE)
or less explicitly
matrix(y, nrow=length(y),ncol=length(x))
Michael
On Wed, Oct 5, 2011 at 12:11 PM, <fernando.cabrera at nordea.com> wrote:
> Hi guys
>
> I have vectors x <- c(1,2,3,4) and y <- c(4,3,9) and would like to generate a matrix which has 3 rows (length(y)) and 4 columns (length(x)), and each row is the corresponding y element repeated length(x) times.
>
> 4,4,4,4
> 3,3,3,3
> 9,9,9,9
>
> Thanks.
>
> Fernando ?lvarez
>
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