madlib/madlib — pull request #140 by renyi533 (2012-05-07 03:19:09+00:00)
Title: File renaming for decision tree

In this pull request, there is no contents change. We renamed/separated several files for clarity.

The changes are:

1. Change the module's name to 'cart' from 'decision_tree'. We will add regression tree's function to this module.
2. Change the name of 'utility.sql_in' to 'dt_utility.sql_in'.
3. Change the name of 'decision_tree.c' to 'dt.c'.
4. Separate the file of 'decision_tree.sql_in' into two files, namely 'dt.sql_in' and 'c45.sql_in'. The first file contains the common functions shared by c4.5 and random forest. The second file contains the c4.5 APIs.