Re: [Mulan-list] Confusion Matriz

[<bo...@uc...>]

Hi,
The confusion matrix is not implemented in multilabel libraries, neither mulan nor meka. Currently, this option  is not avalaible, but it could be implemented in the package mulan.evaluation.loss and generate it during the evaluation. But it can be more time consumer in datasets with many labels. Or the matrix could be updated inside the evaluation of some measure and thus no time consumes. In fact, the slowest step in Mulan is the evaluation. I think, it has to be optimized and save time. Greetings,

P1: One point is that if you implement the matrix using separated labels its dimension is L+1xL+1, where L is the number of labels, then the sum of confusion matrix will be greater than the number of instances because of the multilabel classification, in contrast to weka where it is equal to the number of instances. 

P2: Other point is that the confusion matrix can be implemented using the number of distinct labelsets. And thus the sum of matrix will be equal to the number of instances, but the matrix will be much bigger than the above.

P3: Why would need to implement the confusion matrix in multilabel?.
 
Beatriz Ortega Valdés
5to Año Ciencia de la Computación
Universidad de Las Villas
Santa Clara, Villa Clara, Cuba

----- Mensaje original -----
De: Grigorios Tsoumakas <gr...@cs...>
Para: mul...@li...
Enviado: Fri, 11 May 2018 15:18:36 -0400 (CDT)
Asunto: Re: [Mulan-list] Confusion Matriz

Hi,

This isn't possible in Mulan.

Best,

G.T.


On 5/11/2018 4:32 PM, Viviane Menezes wrote:
> Hi,
>
> I'd like to generate the array of confusion. Is it possible in MULAN?
>
> Thanks
>
> []s
>
> Viviane Menezes
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