Hi, I need help to interpret the following code.
I understand that I'm assigning a sample with binary values with replacement and probability of the value being 0 of 90% and 1 of 10%. What I don't understand is the first part:
Usually square brackets would be to indicate the index e.g., 'test', but in this context, I just don't understand what is happening with a conditional in square brackets. Can anyone assist?
Please, see more of the context in the following code:
set.seed(1, sample.kind = "Rounding") disease <- sample(c(0,1), size=1e6, replace=TRUE, prob=c(0.98,0.02)) test <- rep(NA, 1e6) test[disease==0] <- sample(c(0,1), size=sum(disease==0), replace=TRUE, prob=c(0.90,0.10)) test[disease==1] <- sample(c(0,1), size=sum(disease==1), replace=TRUE, prob=c(0.15, 0.85))