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rfunctionrandomsampling

Can `sample()` in R just sample in a specified order?

I was wondering how I could generate 1000 integers from 1 to 1000, one at a time in R. Making this a function, this means on the first run of the function, the function should produce 1, the second run 2, on the third run 3, ... 1000?

I have tried the following in R with no success:

gen = function(n){
  sample(1:n, 1, replace = FALSE)
  }
gen(1000)
Solution

  • This is pretty bad practice, and you would be better rethinking your plan, but we can do it using a global variable, using <<-:

    myfunc <- function(){
  if(!exists('mycounter')){
    mycounter<<-1
  }else {
    mycounter <<- mycounter + 1
  }
  return(mycounter)
}

> myfunc()
[1] 1
> myfunc()
[1] 2
> myfunc()
[1] 3
> myfunc()
[1] 4

    You could extend this to eg: index another vector of randoms. Though, set.seed() would probably be want you want.