libsvm 操作手册
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examples of options: -s 0 -c 10 -t 1 -g 1 -r 1 -d 3
Classify a binary data with polynomial kernel (u'v+1)^3 and C = 10
options:-s svm_type : set type of SVM (default 0)0 -- C-SVC1 -- nu-SVC2 -- one-class SVM3 -- epsilon-SVR4 -- nu-SVR-t kernel_type : set type of kernel function (default 2)0 -- linear: u'*v1 -- polynomial: (gamma*u'*v + coef0)^degree2 -- radial basis function: exp(-gamma*|u-v|^2)3 -- sigmoid: tanh(gamma*u'*v + coef0)-d degree : set degree in kernel function (default 3)-g gamma : set gamma in kernel function (default 1/num_features)-r coef0 : set coef0 in kernel function (default 0)-c cost : set the parameter C of C-SVC, epsilon-SVR, and nu-SVR (default 1)-n nu : set the parameter nu of nu-SVC, one-class SVM, and nu-SVR (default 0.5)-p epsilon : set the epsilon in loss function of epsilon-SVR (default 0.1)-m cachesize : set cache memory size in MB (default 100)-e epsilon : set tolerance of termination criterion (default 0.001)-h shrinking: whether to use the shrinking heuristics, 0 or 1 (default 1)-b probability_estimates: whether to train a SVC or SVR model for probability estimates, 0 or 1 (default 0)-wi weight: set the parameter C of class i to weight*C, for C-SVC (default 1)The k in the -g option means the number of attributes in the input data.
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