Re: [Bug-gnubg] (OT) Position ID documentation

[Øystein Johansen]

??? Strange. I copied and pasted from a web site.

function productRange(a,b) {
  var product=a,i=a;

  while (i++<b) {
    product*=i;
  }
  return product;
}

function combinations(n,k) {
  if (n==k) {
    return 1;
  } else {
    k=Math.max(k,n-k);
    return productRange(k+1,n)/productRange(1,n-k);
  }
}

function
 distributions(N, M) {
  return  combinations( N+M-1,M); 
}

Maybe I should not trust everything I read. However, I can't immediately see any bugs in the above code....
Aha! Now I see! It's wrong when k = 0, I'll fix it. Hang on.

May be a bad fix, but I think it works better now.

-Øystein

2010/5/28 Massimiliano Maini <address@hidden>

Now it works.

Your combinations function seems to be wrong for m=0:

combin(24,0) = 1
combinations(24,0) = 25

Guess you just have to define distribution as a function of COMBIN ...

MaX.

2010/5/28 Øystein Johansen <address@hidden>:

> 2010/5/28 Massimiliano Maini <address@hidden>
>>
>> Google docs, right .. excel is so has been :)
>>
>> BTW, your link does not work.
>
> I see .... I'll try to publish it as a web page:
>
> http://spreadsheets.google.com/pub?key=tqUcK-zFdgQC_byUJvbgqvQ&output=html
>
> -Øystein
>
>