The document discusses using the command line interface in Weka. It describes how to run the J48 classifier on an ARFF file from the command line using "java weka.classifiers.trees.J48 -t weather.arff". It also explains Weka's package hierarchy and how the JVM creates instances of classifiers by allocating memory when executing them from the command line. Finally, it mentions that command line options can display the applicable options for a given scheme, including general and scheme-specific options.

1. The Command-line Interface

2. IntroductionOne can use the command line interface of Weka either through a command prompt or through the SimpleCLI modeFor example to fire up Weka and run J48 on a ARFF file present in the current working directory, the command is:java weka.classifiers.trees.J48 -t weather.arffWeka consists of a hierarchical package system. For example here J48 program is part of the treespackage which further resides in the classifier package. Finally the wekapackage contains the classifiers package

3. Introduction

4. Structure of WekaEach time the Java virtual machine executes J48, it creates an instance of this class by allocating memory for building and storing a decision tree classifierThe structure of Weka can also be studied from the online Javadoc of Weka

5. Command line optionsThe -t option was used in the command line to communicate the name of the training file to the learning algorithmIf you invoke a scheme without any command-line options at all, it displays the applicable options: first the general options, then the scheme-specific ones

6. Command line optionsGeneral options

7. Command line optionsScheme-specific options

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