weighted support vector machine

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Java

MatLab

hi dear all I work on weighted classification by SVM (matlab preferable or any other language java) as a part of my work , and want to apply weight of features for every features used as input of svm as an example if data set is input= {1 2 3; 4 5 6; 7 8 9; 10 11 12}.I want to apply a weight vector such as {0.5 1 2} so every features in first column of input = 1 4 7 10 have 1/4 importance of features in the third column = 3 6 9 12 in the svm computation.
is there possible by matlab or java library itself? or if not were i can find a good source code of svm written by matlab? tnx very lot