yes!
thank you very much:-)
> 在 2015年4月2日，下午7:13，Sean Owen 写道：
>
> Right, I asked because in your original message, you were looking at
> the initialization to a random vector. But that is the initial state,
> not final state.
>
> On Thu, Apr 2, 2015 at 11:51 AM, lisendong wrote:
>> NO， I’m r
Oh, I found the reason.
according to the ALS optimization formula :
If a user’s all ratings are zero, that is, the R(i, Ii) is a zero matrix, so
the final result feature of this user will be all-zero vector…
> 在 2015年4月2日，下午6:08，Sean Owen 写道：
>
> You're referring to the initialization, not
Right, I asked because in your original message, you were looking at
the initialization to a random vector. But that is the initial state,
not final state.
On Thu, Apr 2, 2015 at 11:51 AM, lisendong wrote:
> NO， I’m referring to the result.
> you means there might be so many zero features in the
NO， I’m referring to the result.
you means there might be so many zero features in the als result ？
I think it is not related to the initial state, but I do not know why the
percent of zero-vector is so high(50% around)
> 在 2015年4月2日，下午6:08，Sean Owen 写道：
>
> You're referring to the initializ
