[R] fMultivar rollMax question

Omar Lakkis uofiowa at gmail.com
Wed Jul 5 20:06:40 CEST 2006


I am using fMultivar under R 2.2.1 on a Debian linux box. Could
someone, please, explain to me why there are two trailing NAs in the
last statement in the code beow?


> library(fMultivar)
> x <- 1:20
> rollMax(x, n=3)
 [1]  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20
> rollMax(x, n=2)
 [1]  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20
> rollMax(x, n=1)
 [1]  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 NA NA
>



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