[R] vector
David Winsemius
dwinsemius at comcast.net
Tue Dec 2 05:57:48 CET 2008
> pop<-c(1,5,14,7,9,12,18,19,65,54)
> samp <- sample(pop, 2, replace=FALSE)
> samp
[1] 14 9
> pop2<- pop[!pop %in% samp]
> pop2
[1] 1 5 7 12 18 19 65 54
On Dec 1, 2008, at 2:29 PM, Hamid Hamid wrote:
> Dear All,
> I am trying to build a program which will take repeated samples
> without
> replacement from a population of values. The interesting catch is
> that I
> would like the sample values to be removed from the population,
> after each
> sample is taken.
>
> For example:
>
> pop<-c(1,5,14,7,9,12,18,19,65,54)
>
>
> sample(pop, 2) = lets say, (5,54)
> ## This is where I would like values (5, 54) to be removed from the
> population vector, giving a new "current" population vector:
>
>
> "new" pop = [1,14,7,9,12,18,19,65]
> and has length 8 instead of 10.
>
> In the cases when the size of pop and deriven sample of it is enough
> large
> using the following command is not helpful.
> newpop<-pop[-c(2,10)]
>
> One could simplify my question in this way: how we can exclude a sub
> vector
> values from a super vector value (i.e sub vecor values are subset
> of super
> vector values).
> Thanks in advance.
> Hamid
>
> [[alternative HTML version deleted]]
>
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