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% Version: $Revision: 6192 $

For most users, the existing WEKA framework will be sufficient to perform the
task at hand, offering a wide range of filters, classifiers, clusterers, etc.
Researchers, on the other hand, might want to add new algorithms and compare
them against existing ones. The framework with its existing algorithms is not
set in stone, but basically one big plugin framework. With WEKA's automatic
discovery of classes on the classpath, adding new classifiers, filters, etc. to
the existing framework is very easy.

Though algorithms like clusterers, associators, data generators and
attribute selection are not covered in this chapter, their implemention is very
similar to the one of implementing a classifier. You basically choose a
superclass to derive your new algorithm from and then implement additional
interfaces, if necessary. Just check out the other algorithms that are already
implemented.

The section covering the GenericObjectEditor (see chapter
\ref{genericobjecteditor}) shows you how to tell WEKA where to find your
class(es) and therefore making it/them available in the GUI
(Explorer/Experimenter) via the GenericObjectEditor.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Writing a new Classifier %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\clearpage
\section{Writing a new Classifier}
\input{extending_classifier}

%%%%%%%%%%%%%%%%%%%%%%%%
% Writing a new Filter %
%%%%%%%%%%%%%%%%%%%%%%%%

\newpage
\section{Writing a new Filter}
\input{extending_filter}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Writing other algorithms %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\newpage
\section{Writing other algorithms}
\input{extending_other_algorithms}

%%%%%%%%%%%%%%%%%%%%%%%%%%
% Extending the Explorer %
%%%%%%%%%%%%%%%%%%%%%%%%%%

\newpage
\section{Extending the Explorer}
\input{extending_explorer}

