libsvm3.1 java接口版本 可实现分类和回归 实现二分类任务调用训练语句前 采用svm_scale将数据特征值缩放到[-1,1]-classification and regression interface version of libsvm3.1 java achieve to adopt svm_scale before the two-class the task invoked training statement data eigenvalues ​ ​