function getX(p,n){
var s = 1 / n;
var x = 0;
while( x < n && (x*s < p)) x++;
return x-1;
}
On Mon, Oct 6, 2008 at 7:24 PM, Iván N Paz <[EMAIL PROTECTED]> wrote:
>
> Hello again....
>
> Remember last post on this??? Scratch it, that problem solved, new one
> arised (actually, it was never ok in the first place)
>
> Right now it all has narrowed to a javascript/math problem.... If
> anyone can take a look at it, help me/us, I would highly appreciate
> it!!!
>
> Its a simple/stup1d problem, I solved some time ago for another
> project, and suddenly it was erased from my mind or smth... :-(
>
> Im no mathematician, sorry... dont know the correct jargon, so please,
> bear with me:
>
> Situation:
>
> Given an array of objects:
> a[0] = object;
> a[1] = object;
> a[2] = object;
> a[3] = object;
> a[n] = object;
>
> and a number ranging 0-1 (floats)
>
> I need to know to which item of the array the value corresponds.
>
> Lets put it into variables:
>
> known values:
>
> p = [0 - 1] (ranges from zero to one, floating numbers)
> n = Amount of elements in the array
> s = How much this element takes in the whole array (1 / a.length)
>
> unknown:
>
> X = should be between 0 and (a.length-1)
>
> X, is the %^&%&%&[EMAIL PROTECTED])* value I still cant get.... :-(
>
>
> eg.
>
> - A has 5 elements
> - each element would take 0.2 'space' from A (being '1' the total)
>
> Expected results:
>
> if p == 0.15 then X == 0 (its the 1st element)
> if p == 0.45 then X == 2 (its in the 3rd element)
> if p == 0.24 then X == 1 (its in the 2nd element)
>
> Any ideas?????
>
> Thanks!!!!
>
> BTW, you can take a look at this here:
>
> http://ivanicus.com/moo/
>
