Message-ID: <4B52F3A3.2080808@erasmusmc.nl>
Date: 2010-01-17T11:25:23Z
From: Dimitris Rizopoulos
Subject: Choose every second value
In-Reply-To: <4B52F26A.1040502@googlemail.com>
try this:
a <- c(1,2,3,4,5,6)
n <- length(a)
a[seq(1, n, 2)]
a[seq(2, n, 2)]
I hope it helps.
Best,
Dimitris
Walther, Alexander wrote:
> Dear list,
>
> is there a command that selects every second value from a given vector?
> For instance,
>
> a <- c(1,2,3,4,5,6)
>
> should yield
>
> 1,3,5
>
> and
>
> 2,4,6
>
> which i intend to place into two seperate vectors.
>
>
> best
>
> Alex
>
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--
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center
Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
Tel: +31/(0)10/7043478
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