I'm am completely stumped on a seemingly simple math formula
I need to find a way to map a set of numbers up to 4 (e.g. 1,2,3,4 or 1,2) to any number in a range of up to 10,000 (ideally, unlimited). Such that,
(e.g. 1,2,3,4)
1 is to 1 2 is to 2 3 is to 3 4 is to 4
5 is to 1 6 is to 2 7 is to 3 8 is to 4
9 is to 1 10 is to 2 11 is to 3 12 is to 4
13 is to 1 14 is to 2 15 is to 3 16 is to 4
etc.
Here is an (untested) function that may work:
function map_four( $num )
{
$map_val = $num % 4;
if ($map_val) {
return $map_val;
} else {
return 4;
}
}Basically, it looks like a modulus with 4, except that you want multiples of four to return four instead of zero.
Unless, of course, I completely misunderstood the question. Which is not uncommon as of late.
-- Rob
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