If all you want to do is create a dataset of numbers, say 1-100, then you can do it like this.
Numbers = seq(1, 100, by=1)
Now you will have something called Numbers, that includes all numbers 1-100. If you wanted every second number you could change it so that it was by=2.
Numbers = seq(1, 100, by=1)
Now you will have something called Numbers, that includes all numbers 1-100. If you wanted every second number you could change it so that it was by=2.