Get data from array in Number format

Question

Ive got this array with numbers in it, which i want to use for some simple calculations, but i keep getting the message that the array data isnt a number:
The whole is in a for loop, with teller1 as increasing value.
the code:
var xco:Array = [180,233,271,292,292,270,231,179,124,74,34,11,9,30,70,121];
var yco:Array = [11,33,73,124,181,232,270,290,291,271,234,183,125,72,33,11];
for(var teller1=1; teller1<33; teller1++) {
    var ringsegment_mc:Ring_1=new Ring_1();
    ringsegment_mc.x=xco[teller1]+kernplaats;
    ringsegment_mc.y=yco[teller1]+kernplaats;
    ringsegment_mc.addEventListener(Event.ENTER_FRAME,vernietig);
    addChild(ringsegment_mc);
    switch(teller1) {
     case 16:
     //kernplaats=Math.random()*600+300;
     kernplaats=Number(400);
     trace (yco[teller1]);
     trace (yco[teller1]+kernplaats);
so the trace functions give:
undefined
NaN
so i tried using this:
trace (yco[3]);
trace (yco[3]+kernplaats);
which gave this:
124
524
so something is going wrong when trying to read the array, but what? and how can it be fixed/

Answer 1

I don't know what you are after, but if you want to use the same loop twice, then put it inside another loop... (note that arrays start at index 0, not 1)
for(var i=0; i<2; i++){
  for(var teller1=0; teller1<16; teller1++) {
    var ringsegment_mc:Ring_1=new Ring_1();
    ringsegment_mc.x=xco[teller1]+kernplaats;
    ringsegment_mc.y=yco[teller1]+kernplaats;
    ringsegment_mc.addEventListener(Event.ENTER_FRAME,vernietig);
    addChild(ringsegment_mc);
    switch(teller1) {
     case 16:
     //kernplaats=Math.random()*600+300;
     kernplaats=Number(400);
     trace (yco[teller1]);
     trace (yco[teller1]+kernplaats);