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"Weighted SVM"

m_r_nour

Weighted SVM is an excellent classifier to deal with unbalanced data.

Do you have any idea , how we can use it in RM?

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RalfKlinkenberg

RapidMiner provides several SVM implementations (RapidMiner operators JMySVM, LibSVM, EvoSVM, PsoSVM, ...) and several ways to use weights and/or cost factors:

JMySVM supports class weights for two class problems.
MetaCost can be used to assign different misclassification costs (weights) to different classes.

m_r_nour

thank you

but I do not know how to use Libsvm and moreover how to use meta cost to tune parameters of Libsvm
ratio of no. of data in my dataset are:
50%,25%,10%,7%,5%,2%,1%
no of sample 3120 and number of features :57

I'd be appreciate if you help me to deal with this problem

regards
REZA

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