연속사용시 if와 else if

test  <- c(3, 2, 4)

output <- c()

for (i in 1:3)
{
  if (test[i] > 1) output[i] <- 1
  if (test[i] > 2) output[i] <- 0
  if (test[i] > 3) output[i] <- 1
}

output

## [1] 0 1 1

for (i in 1:3)
{
  if (test[i] > 1) output[i] <- 1
    else if (test[i] > 2) output[i] <- 0
      else if (test[i] > 3) output[i] <- 1
}

output

## [1] 1 1 1