[R] Random Sequence

[Matthew Keller]

Hi Anup,

(runif(100)<.5)*1   #would give you 0's and 1's.

sample(rep(c(-1,1),50),100)  #A bit slower I think, gives you -1's and 1's


Best,

Matt

On 4/12/07, Anup Nandialath <anup_nandialath at yahoo.com> wrote:
> Dear Friends,
>
> I'm trying to generate a sequence of 100 observations
> with either a 1 or -1. In other words the sequence
> should look something like this.
>
> y = 1 1 -1 1 -1 -1 -1 1 1 ......
>
> Can somebody please give me some direction on how I
> can do this in R.
>
> Thanks
>
> Anup
>
>
>
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-- 
Matthew C Keller
Postdoctoral Fellow
Virginia Institute for Psychiatric and Behavioral Genetics