> 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
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