set.seed(1) x <- runif(100) # I want to calculate y such that: # # 1. if x>0.75, y <- 1 # 2. else if x<0.25, y <- -1 # 3. else if y_prev==1 && x<0.5, y <- 0 # 4. else if y_prev==-1 && x>0.5, y <- 0 # 5. else y <- y_prev # # 1. and 2. are directly doable without looping. # # How do I do 3.-5. without looping? The problem is, I need to run this algorithm over gigs of data, so I # need to avoid looping, if at all possible... # # - Ken
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