在Linux上运行WEKA

Question

我已经下载并解压缩了以下WEKA版本weka-3-4-19.这是在Linux操作系统上.我希望通过命令行使用WEKA,但是在执行时

java weka.classifiers.tress.j48.J48

我收到以下错误消息:

Exception in thread "main" java.lang.NoClassDefFoundError: weka/classifiers/tress/j48/J48
Caused by: java.lang.ClassNotFoundException: weka.classifiers.tress.j48.J48
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: weka.classifiers.tress.j48.J48.  Program will exit.

有人可以帮我解决这个问题吗？谢谢.

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EDIT1:

在尝试java -jar weka.jar命令时

java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
    at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
    at java.awt.Window.<init>(Window.java:432)
    at java.awt.Frame.<init>(Frame.java:403)
    at javax.swing.JFrame.<init>(JFrame.java:202)
    at weka.gui.GUIChooser.<init>(GUIChooser.java:98)
    at weka.gui.GUIChooser.main(GUIChooser.java:285)

No X11 DISPLAY variable was set, but this program performed an operation which requires it.

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编辑2:

在尝试java.weka.classifiers.trees.J48

Exception in thread "main" java.lang.NoClassDefFoundError: weka/classifiers/tress/J48
Caused by: java.lang.ClassNotFoundException: weka.classifiers.tress.J48
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: weka.classifiers.tress.J48.  Program will exit.

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编辑3:

{cslinux2:~/weka-3-4-19} echo $CLASSPATH
/people/cs/j/jld082000/weka-3-4-19/weka.jar:
{cslinux2:~/weka-3-4-19} java weka.classifiers.trees.J48

Weka exception: No training file and no object input file given.

General options:

-t <name of training file>
    Sets training file.
-T <name of test file>
    Sets test file. If missing, a cross-validation will be performed on the training data.

Answer 1

这只是意味着weka.classifiers.tress.j48.J48类不在类路径中.您可以java使用-classpathswitch 编写命令或设置CLASSPATH(永久)变量.另一种方法是使用-jar@jberg指向的开关.

编辑:

当我检查(我从该网站下载了Weka 3-4-19 )时,肯定没有weka.classifiers.tress.j48.J48课程weka.jar包.可能您正在寻找:

java weka.classifiers.trees.J48

例如:

$ export CLASSPATH=/home/grzegorz/weka-3-4-19/weka.jar:.
$ echo $CLASSPATH 
/home/grzegorz/weka-3-4-19/weka.jar:.
$ java weka.classifiers.trees.J48

Weka exception: No training file and no object input file given.

General options:

-t <name of training file>
    Sets training file.
...

Answer 2

这个"weka.classifiers.trees.j48.J48"是Weka文档中的拼写错误.它应该是这样的:"weka.classifiers.trees.J48"

而不是设置$ CLASSPATH替代只是放置:

java -cp /pathto/weka.jar weka.classifiers.trees.J48

此外,您可能希望为其提供更多内存,以加快速度:

java -Xmx1G -cp /pathto/weka.jar weka.classifiers.trees.J48

对于运行分类器(就像你试图做的那样),你至少需要给它一些数据,这些数据必须已经转换为ARFF格式.

要对某些数据运行测试,请输入:

java -Xmx1G -cp /path/to/weka.jar weka.classifiers.trees.J48 -t /path/to/whatever.arff

-t用于培训文件.

见: Weka Primer