How generate random numbers from given vector???

I wanna generate random numbers from a vector...

for example number<-c(0,1,3,4,5,6,8)
 so
 
rsidp<-function(x){
	i=0
	for (i in seq(1:x))

	{y<-sample(number,x, replace=T)}
	return(y)
}
 so all random numbers have to be from vector "number";
so if I type rsidp(5)..... it has to give me 5 random numbers except 2,7,9
(because they are not in the vector "numbers"). help me plz with it (((







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