WEKA运行参数修改(RunWeka.ini文件)

一般使用weka进行数据挖掘的时候会碰到两个问题，一是内存不够，二是libsvm使用不了，这时就需要重新配置RunWeka.ini文件，解决上述问题。查看RunWeka.ini原文如下：

 # Contains the commands for running Weka either with a command prompt
 # ("cmd_console") or without the command prompt ("cmd_default").
 # One can also define custom commands, which can be used with the Weka
 # launcher "RunWeka.class". E.g., to run the launcher with a setup called
 # "custom1", you only need to specify a key "cmd_custom1" which contains the
 # command specification.
 #
 # Notes:
 # - This file is not a DOS ini file, but a Java properties file.
 # - The settings listed here are key-value pairs, separated by a "=". Every
 #   key can only be listed ONCE.
 #
 # Author  FracPete (fracpete at waikato dot ac dot nz)
 # Version $Revision: 1.3 $

 # setups (prefixed with "cmd_")
 cmd_default=javaw -Dfile.encoding=#fileEncoding# -Xmx#maxheap# #javaOpts# -classpath "#wekajar#;#cp#" #mainclass#
 cmd_console=cmd.exe /K start cmd.exe /K "java -Dfile.encoding=#fileEncoding# -Xmx#maxheap# #javaOpts# -classpath \"#wekajar#;#cp#\" #mainclass#"
 cmd_explorer=java -Dfile.encoding=#fileEncoding# -Xmx#maxheap# #javaOpts# -classpath "#wekajar#;#cp#" weka.gui.explorer.Explorer
 cmd_knowledgeFlow=java -Dfile.encoding=#fileEncoding# -Xmx#maxheap# #javaOpts# -classpath "#wekajar#;#cp#" weka.gui.beans.KnowledgeFlow

 # placeholders ("#bla#" in command gets replaced with content of key "bla")
 # Note: "#wekajar#" gets replaced by the launcher class, since that jar gets
 #       provided as parameter
 maxheap=1024M
 # The MDI GUI
 #mainclass=weka.gui.Main
 # The GUIChooser
 mainclass=weka.gui.GUIChooser
 # The file encoding; use "utf-8" instead of "Cp1252" to display UTF- characters in the
 # GUI, e.g., the Explorer
 fileEncoding=Cp1252
 # The JAVA_OPTS environment variable (if set). Can be used as an alternative way to set
 # the heap size (or any other JVM option)
 javaOpts=%JAVA_OPTS%
 # The classpath placeholder. Add any environment variables or jars to it that
 # you need for your Weka environment.
 # Example with an enviroment variable (e.g., THIRD_PARTY_LIBS):
 #   cp=%CLASSPATH%;%THIRD_PARTY_LIBS%
 # Example with an extra jar (located at D:\libraries\libsvm.jar):
 #   cp=%CLASSPATH%;D:\\\\libraries\\\\libsvm.jar
 # Or in order to avoid quadrupled backslashes, you can also use slashes "/":
 #   cp=%CLASSPATH%;D:/libraries/libsvm.jar
 cp=%CLASSPATH%

其中maxheap选项为配置weka最大使用内存，默认为1024M；

　　cp选项为引入包所在路径，从注释中的说明可以看到libsvm包的添加方法；

　　其他如：mainclass，fileEncoding，javaOpts分别为图形用户界面，文件编码，Java虚拟机选项。