LIBSVM是台湾大学林智仁(Lin Chih-Jen)教授等开发设计的一个简单、易于使用和快速有效的SVM模式识别与回归的软件包，他不但提供了编译好的可在Windows系列系统的执行文件，还提供了源代码，方便改进、修改以及在其它操作系统上应用；该软件对SVM所涉及的参数调节相对比较少，提供了很多的默认参数，利用这些默认参数可以解决很多问题；并提供了交互检验(Cross Validation)的功能。该软件可以解决C-SVM、ν-SVM、ε-SVR和ν-SVR等问题，包括基于一对一算法的多类模式识别问(LIBSVM is a simple, easy to use and fast and efficient software package for SVM pattern recognition and regression developed by Professor Lin Zhiren (Lin Chih-Jen) of National Taiwan University. He not only provides the compiled executable files in the Windows system, but also provides the source code for the convenience of improvement, modification and Application on other operating systems; the software regulates the parameters involved in SVM. Relatively few, provide a lot of default parameters, using these default parameters to solve a lot of problems; and provide the function of Cross Validation. This software can solve the problem of C-SVM, V -SVM, e -SVR and V -SVR, including a multi class pattern recognition algorithm based on Q)