Choose every second value
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 Fax: +31/(0)10/7043014