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-   -   Multi-Class Classifier (http://book.caltech.edu/bookforum/showthread.php?t=604)

dbl001 06-01-2012 08:37 AM

Multi-Class Classifier
 
Hi,

Can support vector machines be used as multi-class classifiers?

Thanks in Advance

yassin.ezbakhe 06-01-2012 12:09 PM

Re: Multi-Class Classifier
 
LIBSVM supports multi-class classification. If you're using Python, you can use scikit-learn, which under the hood uses LIBSVM; for an example, go here: http://scikit-learn.sourceforge.net/...classification

hsolo 08-21-2013 05:47 PM

Re: Multi-Class Classifier
 
Not a direct followup to this question but I was wondering how Multinomial Softmax (generalization of logistic for multiple classes) compares with SVMs for multi-class problem, in practice.

One difference is the softmax directly gives the probability whereas SVM probabilities are 'indirect'

I was wondering how does this comparison pan out in practice?

rimidan 09-12-2015 08:16 PM

Re: Multi-Class Classifier
 
That is an interesting question. Maybe yassin is still around and has an answer to that.

htlin 09-16-2015 02:56 AM

Re: Multi-Class Classifier
 
Quote:

Originally Posted by hsolo (Post 11457)
Not a direct followup to this question but I was wondering how Multinomial Softmax (generalization of logistic for multiple classes) compares with SVMs for multi-class problem, in practice.

One difference is the softmax directly gives the probability whereas SVM probabilities are 'indirect'

I was wondering how does this comparison pan out in practice?

In my experience one-versus-all linear SVM and multinomial logistic regression are somewhat comparable in practice.


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