[Cs5500] Reputation formula

[rashmi nayak]

Hi Ahmed,

I think there is a small typo in your formula - Should the formula be:

exchangeR = (losR*baseR - losR*winR + losR*losR) / (baseR * 10)

instead of
exchangeR = (losR*baseR - losR*winR - losR*losR) / (baseR * 10)

Note: + losR*losR not -losR*losR

Thanks,
Rashmi

On Tue, Mar 8, 2011 at 1:30 PM, Ahmed Abdelmeged <ahmed.mohsen at gmail.com>wrote:

> Looking at this formula in it's non-factored form:
> exchangeR = (losR*baseR - losR*winR - losR*losR) / 1000
> I'd say that the 1000 is somehow related to that baseR/winR/losR are (of
> the order) 100
> Probably, what is required is to first divide the denominator by baseR to
> bring it down to the order of baseR then divide by 10.
> To sum up,
> exchangeR = (losR*baseR - losR*winR - losR*losR) / (baseR * 10)
>
> BTW, -(winR - losR) = losR - winR
>
> On Tue, Mar 8, 2011 at 12:02 PM, James Vega <jamessan at ccs.neu.edu> wrote:
>
>> On Tue, Mar 8, 2011 at 11:27 AM, Yue Liu <liu.yue at husky.neu.edu> wrote:
>> > Assume avatars will get 100 reputation initially, we need to chage the
>> > percentage sign "%" to "/1000".
>> > So the formula will be:
>> >
>> > If winR >= losR,         // winner's Reputation >= loser's Reputation
>> > exchangeR = losR*(baseR - (winR - losR))/1000;
>> > Else,
>> > exchangeR = losR*(baseR + (losR - winR))/1000;
>>
>> There's no need for two cases here.  The second case will naturally
>> happen if winR < losR since (winR - losR) will be a negative number.
>> Otherwise, I think the suggested formula does address most of the points
>> brought up in class.
>>
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>
>
>
> --
> Ahmed
>
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