weight vector in java with libsvm different than in MATLAB without libsvm

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I have implemented LIBSVM in eclipse for binary classification of genes (100 by 584 dataset). When I compute the weight vector I get values in the range -5.62429704166405 to 5.12529916688051. Similar classification has been done in a matlab code (using some dll file for the SVM classification, I do not have the source file so I am not sure what is there inside the dll files) and when I use the same dataset and compute the weight vector in matlab, I see values in the range - 0.00016487 to 0.0028375.
Number of misclassifications and support vectors is comparable though in both the codes.
It seems weird to find such difference in weight vector coefficients. I am using RBF and C-SVC and I keep trying different values of C and gamma. I don't know what model has been used in matlab. Does it mean there is something wrong in my code?

Thanks!

Posted 28-Oct-13 15:10pm

Member 10305598

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Member 10305598 28-Oct-13 22:35pm

I re-checked the weight vector values using quadprog in matlab and the values are similar to the matlab code using dll files

Prdpsnh 8-Apr-15 14:03pm

Hello sir i having same problem that how to find weight vector w in java imlementation of libsvm .can you please share code or guide how to do so thanks

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