DCG should check the order and the formula seems not , just check if
it contains the item
if (relevantItemIDs.contains(item.getItemID())) {
cumulativeGain += discount;
}
Second thing is that it have a relevance number "rel" which the
formula don't use.
On Wed, Apr 4, 2012 at 3:54 PM, Sean Owen <[email protected]> wrote:
> It's the same formula, what do you think is different?
>
> On Wed, Apr 4, 2012 at 9:35 PM, ziad kamel <[email protected]> wrote:
>> Hi , I checked the code for NDCG and it seems not same as
>> http://en.wikipedia.org/wiki/Discounted_cumulative_gain
>> How that formula was derived ?
>>
>> Thanks
