In order to have C4.5 work with the universal-tester, certain
changes have been made to the C4.5 C code.  These are described below.
The main change os to separate training and testing into two separate
executables so that each can be run and timed separately.

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changes to existing executables

c4.5

This executable now takes a -x flag, which prevents the testing of the training
data and supresses printout.  This is too ease use by an external program such
as the universal tester.


c4.5rules

This also now includes a -x flag to supress printout.

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new executables

c4.5test

This allows for separate testing of a tree already created by c4.5 and
stored in the files stem.tree and stem.unpruned. It takes the following
options.

  -t    Test on training data in stem.data instead of test data in stem.test

  -u    Test unpruned tree rather than pruned tree

  -f filestem   Specify the filestem to use.

  -c    Print a confusion matrix.

  -i    Print a line with a 0 or a 1 for each example tested according to
        whether it was classified correctly or incorrectly.


c4.5rtest

This allows for separate testing of rules already created by c4.5rules and
stored in the file stem.rules. It takes the following options.

  -t    Test on training data in stem.data instead of test data in stem.test

  -f filestem   Specify the filestem to use.

  -c    Print a confusion matrix.

  -i    Print a line with a 0 or a 1 for each example tested according to
        whether it was classified correctly or incorrectly.