In the R programming language, let's say you want to create a random binary vector with 4 elements.
The limitation is that the numbers one and zero must be equal.
So,
(0,0,1,1) (0,1,1,0) (1,1,0,0) ...
Is there an easy way to do this?
Just randomly select each case without replacement from a set containing 2 0 and 2 1.
sample(rep(0:1,each=2)) #[1] 0 1 1 0
Always works:
replicate(3,sample(rep(0:1,each=2)),simplify=FALSE) #[[1]] #[1] 1 0 0 1 # #[[2]] #[1] 0 1 0 1 # #[[3]] #[1] 1 1 0 0
sample(c(1,1,0,0), 4)
or generalize to:
sample(rep(c(0,1),length.out=n/2),n)
Create a random binary vector with random and zeros:
#create a binary vector: result <- vector(mode="logical", length=4); #loop over all the items: for(i in 1:4){ #for each item, replace it with 0 or 1 result[i] = sample(0:1, 1); } print(result);
Printing
[1] 0 1 1 0