svmtrain错误“组必须是向量". [英] svmtrain error "Group must be a vector."

问题描述

我正在尝试使用 LibSVM 的Matlab界面训练SVM a>，但出现以下错误

I am trying to train a SVM with the Matlab interface of LibSVM, but I get following error

 model = svmtrain(Classes(train),Attributes(train,:),'-s 0 -t 2');
 ??? Error using ==> svmtrain at 172 Group must be a vector.

另请参阅此处的评论:在matlab中支持矢量机

See also comment here: support vector machines in matlab

推荐答案

问题是，Matlab正在使用其拥有自己的SVM实现，该实现除其他外还以不同的顺序获取变量.

The problem is, that Matlab is using its own SVM implementation which takes among other things the variables in different order.

要使其工作，请确保LibSVM库是Matlab搜索路径的一部分.一种选择是使用Matlab文件浏览器(Current Folder)进入LibSVM文件夹并使用菜单Add to Path-> Selected Folders and Subfolders.如果这解决了您的问题，并且您需要定期使用LibSVM，请使用

To make it work, make sure that the LibSVM library is part of your Matlab's Search Path. One option would be to use the Matlab filebrowser (Current Folder) to go the LibSVM folder and use the menu Add to Path -> Selected Folders and Subfolders. If this solves your problem and you need LibSVM regularly, add the folder to your startup.m using addpath.

另请参阅:错误:类型为"double"的输入参数的未定义函数或方法"svmtrain"

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