4d88b00958defd05827217b27bfb4daf6b0a7084 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/4f3549a961dbc226b8eb45407e44f726d2ac5bb9 4f3549a961dbc226b8eb45407e44f726d2ac5bb9

2009-04-13T07:43:50-07:00

Removed temp files 7a14ce31dbd54f6b85504da3fe40198419422b74 Alex Vollmer alex.vollmer@gmail.com 6fa6608acc023e95be1579ed72b63bdd612b9e96 Roy Pardee roy@kif.(none) http://github.com/alexvollmer/pci4r/commit/4d88b00958defd05827217b27bfb4daf6b0a7084 4d88b00958defd05827217b27bfb4daf6b0a7084

2009-04-12T12:40:49-07:00

Added reference to Stemmer lib to hoe...spec? a2e9891e9f0def52dadcc97fff62c865cf8c84dd Roy Pardee roy@kif.(none) f058e641e721e17cfd334633f9627f483304e13d Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/6fa6608acc023e95be1579ed72b63bdd612b9e96 6fa6608acc023e95be1579ed72b63bdd612b9e96

2008-12-29T20:31:37-08:00

Fixed spec-brokenness in decision_tree. When we added the 'sum' method to the Array class all hell broke loose with ActiveRecord. I blame ActiveSupport as it can't possible be my fault. :-) 1b851fc9bc41ff2510343bc936085abfea1eec2e Alex Vollmer alex.vollmer@gmail.com 38e83496d188b04f39ecd4b346dc962beb8755c1 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/f058e641e721e17cfd334633f9627f483304e13d f058e641e721e17cfd334633f9627f483304e13d

2008-12-29T20:27:05-08:00

Added cross-validation code from Chapter 8. af444bc8e973953280d560d83882b92fb547b46c Alex Vollmer alex.vollmer@gmail.com 31f4316e2a8d7b6dd7072f061cc8f53707281e03 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/38e83496d188b04f39ecd4b346dc962beb8755c1 38e83496d188b04f39ecd4b346dc962beb8755c1

2008-12-29T20:05:45-08:00

2008-12-29T19:28:39-08:00

Added pricing model code from Chapter 8 9ab8ab2041e97d646edad49c01674a69b471221e Alex Vollmer alex.vollmer@gmail.com 58d742558b2f71366f7d1a0b2e23470320ac4a02 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/31f4316e2a8d7b6dd7072f061cc8f53707281e03 31f4316e2a8d7b6dd7072f061cc8f53707281e03

2008-05-08T20:57:06-07:00

2008-05-08T20:57:00-07:00

Fleshed out the RDoc a bit. I think that's all for now. 10d7be26db8066878736d9c97910a76ba4a795d4 Alex Vollmer alex.vollmer@gmail.com d4733dd512d3f82ef831962e5e3fe55ccf664250 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/58d742558b2f71366f7d1a0b2e23470320ac4a02 58d742558b2f71366f7d1a0b2e23470320ac4a02

2008-05-08T20:37:45-07:00

Added 'variance' method and added a 'sum' method to the Array class to stay DRY. 644eafb1163fa67f20570e97569f68bf02cfc589 Alex Vollmer alex.vollmer@gmail.com a3f105053e459634c93a1229697c3c4135c2c38e Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/d4733dd512d3f82ef831962e5e3fe55ccf664250 d4733dd512d3f82ef831962e5e3fe55ccf664250

2008-05-08T20:26:28-07:00

Implemented 'md_classify' which is a refined classification that handles missing data. 556bfc6ec1241d1c5bd1e57552666fe8db18bf7f Alex Vollmer alex.vollmer@gmail.com 4402eb49c590c2c263c3fcbd312163673ad8abb5 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/a3f105053e459634c93a1229697c3c4135c2c38e a3f105053e459634c93a1229697c3c4135c2c38e

2008-05-07T21:13:23-07:00

DecisionTree.prune now works correctly! a3b8afe2579e9ee451745c1a10104cca0abc343f Alex Vollmer alex.vollmer@gmail.com 2dcb093d0608889e1b08358004b95aebc00b39eb Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/4402eb49c590c2c263c3fcbd312163673ad8abb5 4402eb49c590c2c263c3fcbd312163673ad8abb5

2008-05-05T23:00:15-07:00

Fixed a defect in the 'divide' method and fleshed out specs for tree building. For some strange reason the Ruby code inverts some of the tree nodes. I think it is still semantically correct since all the child nodes of the "flipped" nodes are also inverted and negated. Weird... 3a6ef59b8e50801bd7fc7c086c63c227add2be24 Alex Vollmer alex.vollmer@gmail.com 36f8e9f3677adf3bcde0e9a178d0d4d2a4d6f310 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/2dcb093d0608889e1b08358004b95aebc00b39eb 2dcb093d0608889e1b08358004b95aebc00b39eb

2008-04-30T21:40:17-07:00

2008-04-30T21:40:13-07:00

An attempt to add pruning revealed errors in set splitting. WIP... 201ee72e5bd6f2322489bc965e903dd552b1fe02 Alex Vollmer alex.vollmer@gmail.com 95107d1ff90af0bc985b1669dcc6e35c1b0e402b Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/36f8e9f3677adf3bcde0e9a178d0d4d2a4d6f310 36f8e9f3677adf3bcde0e9a178d0d4d2a4d6f310

2008-04-29T07:46:50-07:00

Ahh, graphviz working a little better. 429cc1e241f2bfe176b0aa5cb26c0428bef41a97 Alex Vollmer alex.vollmer@gmail.com 291e642a779259cc8097efae68b2a40754d56753 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/95107d1ff90af0bc985b1669dcc6e35c1b0e402b 95107d1ff90af0bc985b1669dcc6e35c1b0e402b

2008-04-29T07:41:50-07:00

Fixed the build_tree method to work correctly (with spec). Also a first stab at getting a GraphViz implementation of the graph-generation of tree nodes. Still not quite right... 72be0ccef5a9be33d3fae4ce76d09ecb6d556a3c Alex Vollmer alex.vollmer@gmail.com 12c384421d32738f7aef14b8b05474525edee3b9 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/291e642a779259cc8097efae68b2a40754d56753 291e642a779259cc8097efae68b2a40754d56753

2008-04-23T21:21:55-07:00

Added 'build_tree' function to decision_tree to, well, build decision trees. e0597c3de4ef6e6e9c75e9df74e702a136b30d15 Alex Vollmer alex.vollmer@gmail.com 72764361edaddc8a3229656f76e659a3cfa0a4de Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/12c384421d32738f7aef14b8b05474525edee3b9 12c384421d32738f7aef14b8b05474525edee3b9

2008-04-22T20:18:59-07:00

2008-04-21T21:15:31-07:00

Starting chapter 7 -- Modeling With Decision Trees. Initial implementations of gini_impurity and entropy functions in place with proper specs (driven by the book examples). 7a74f6c50a1c379aa9daacb91a4f844e315bbd5f Alex Vollmer alex.vollmer@gmail.com 3ec8070cbf8ce585ca62f5ebcb795ca63bd46488 23df00488a0f2592d22c01e12bdf0236977ffeac Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/72764361edaddc8a3229656f76e659a3cfa0a4de 72764361edaddc8a3229656f76e659a3cfa0a4de

2008-04-18T21:49:48-07:00

Merge branch 'av/chapter-5' into av/sneak 9b975e3cd4b19fff7ee8133a1ac5874c4aeafd6c Alex Vollmer alex.vollmer@gmail.com b4542280826b50d8c5adf1b8c4f9bd31b748e435 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/23df00488a0f2592d22c01e12bdf0236977ffeac 23df00488a0f2592d22c01e12bdf0236977ffeac

2008-04-18T21:25:08-07:00

Switched from &block parameter to simple "yield" statements. 3132d7e6932ee901aa2f264421585305979ce717 Alex Vollmer alex.vollmer@gmail.com 5e4b4c91f3ab94758258e95ddd2db3d19e34896c Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/b4542280826b50d8c5adf1b8c4f9bd31b748e435 b4542280826b50d8c5adf1b8c4f9bd31b748e435

2008-04-18T21:23:06-07:00

Added 'genetic' function for genetic optimization. 7d952327dede2a65eb8559dc5e835b3bd0c1d4f3 Alex Vollmer alex.vollmer@gmail.com 84a3226b7e97a4d13a268df10d133379867dcda4 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/5e4b4c91f3ab94758258e95ddd2db3d19e34896c 5e4b4c91f3ab94758258e95ddd2db3d19e34896c

2008-04-18T20:41:01-07:00

Fleshed out rdoc. cb8f0ee7c18458b4b398711fe58b95bca1ac6084 Alex Vollmer alex.vollmer@gmail.com 5123f8c93baae5a29529eb35691bc7ef8b4b5012 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/84a3226b7e97a4d13a268df10d133379867dcda4 84a3226b7e97a4d13a268df10d133379867dcda4

2008-04-18T18:30:59-07:00

Fixed some broken-ness with the 'hill_climb' function. Also refactored internal functions in the spec to be a little more readable. Burned once again by the direct port of Python to Ruby. 6e709f8b3c2a4ab8ed539eed58204776b979a16f Alex Vollmer alex.vollmer@gmail.com 6f4448dc4063b797e9933ba63bc9eac8b6d686d9 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/5123f8c93baae5a29529eb35691bc7ef8b4b5012 5123f8c93baae5a29529eb35691bc7ef8b4b5012

2008-04-16T20:55:28-07:00

Added the 'annealing' function. Same sucky specs. cd6641dce231370fa72aa75bbed3ffe4d79a7865 Alex Vollmer alex.vollmer@gmail.com a751721c5dd6e5b1b895ec32cdeca17ecd6331fa Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/6f4448dc4063b797e9933ba63bc9eac8b6d686d9 6f4448dc4063b797e9933ba63bc9eac8b6d686d9

2008-04-16T19:46:49-07:00

2008-04-16T19:45:11-07:00

Added 'hill climbing' optimization. I hate these specs. They flat out suck. 9768ee72a26f1e6198d057059dac829c63203b39 Alex Vollmer alex.vollmer@gmail.com 7b4f926de465a97ca73b8210a9a6ff67fdb2d7a4 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/a751721c5dd6e5b1b895ec32cdeca17ecd6331fa a751721c5dd6e5b1b895ec32cdeca17ecd6331fa

2008-04-16T19:26:21-07:00

Initial check-in for Chapter 5, Optimization. Added lib/optimzation and a backing data file. The spec file is sort of sparse right now, but at least works. 652d241df11a28a9571121462560fb832fe6daee Alex Vollmer alex.vollmer@gmail.com c6c73bca6f80ebf0d51b1e300cb742b394203444 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/7b4f926de465a97ca73b8210a9a6ff67fdb2d7a4 7b4f926de465a97ca73b8210a9a6ff67fdb2d7a4

2008-04-05T16:28:58-07:00

Added rubyforge website files and some rake tasks to manage them. b9cdeed788dd0172be96185f4c32e4e4185e7ac3 Alex Vollmer alex.vollmer@gmail.com 57bb93d8b62cd78fd79682a4fdeb777f0b071ac6 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/c6c73bca6f80ebf0d51b1e300cb742b394203444 c6c73bca6f80ebf0d51b1e300cb742b394203444

2008-04-03T07:30:56-07:00

Added 'spec_with_rcov' task to run rcov with rspec for code coverage. This task will always nuke the 'coverage' directory and rebuild the rcov files. Currently we're not doing any threshold measurement. Also added the 'coverage' directory to .gitignore so we don't commit rcov results. 8e44873c3074e1d5f4b9f8bfea60bb034995417e Alex Vollmer alex.vollmer@gmail.com e790afbd8370da383eb296a5db00c656e4f7e416 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/57bb93d8b62cd78fd79682a4fdeb777f0b071ac6 57bb93d8b62cd78fd79682a4fdeb777f0b071ac6

2008-04-02T17:36:01-07:00

Added task to run RSpec. Simply run 'rake spec' to run all of the specs. For more details checkout the RDoc on Spec::Rake::SpecTask. cf77c20da0701ad17b1d6904c7981a67e72277be Alex Vollmer alex.vollmer@gmail.com 119fc684e5330419b4d7d2f99688bfd23d0ab243 Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/3ec8070cbf8ce585ca62f5ebcb795ca63bd46488 3ec8070cbf8ce585ca62f5ebcb795ca63bd46488

2008-04-02T17:30:46-07:00

The ongoing effort to port searching over to ActiveRecord persistence... fe67a08b0317512a75c507f1ef5691a3a74905ef Alex Vollmer alex.vollmer@gmail.com 9ee3f39a74f22a45b1d71d8c10de03d08dc9665b Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/119fc684e5330419b4d7d2f99688bfd23d0ab243 119fc684e5330419b4d7d2f99688bfd23d0ab243

2008-03-31T11:35:28-07:00

First pass at porting chapter 4 code over to the 'sneak' branch. Basic indexing and page-ranking are in and were converted from direct-SQLite3 code to ActiveRecord. TODO: * Convert Searcher stuff to ActiveRecord * Bring over the neural net stuff * Convert neural net to ActiveRecord * Deal with multiple database configs for ActiveRecord (nn, and search) * Port specs for neural net and searching 4e1b81033aa36680205d21c5b552e8944a89e8e3 Alex Vollmer alex.vollmer@gmail.com 50dae87786c4df1747b0431dbe487fefa7492e7e Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/e790afbd8370da383eb296a5db00c656e4f7e416 e790afbd8370da383eb296a5db00c656e4f7e416

2008-03-30T12:37:40-07:00

Fixed the list of contributors. Sorry Damiano, I forgot to put you on the list. :-P 60c659b9877478689d6bdb2a60f30a6addb031e6 Alex Vollmer alex.vollmer@gmail.com 72341385d972fcd5a6c37a8292368d315002ac4f Alex Vollmer alex.vollmer@gmail.com http://github.com/alexvollmer/pci4r/commit/9ee3f39a74f22a45b1d71d8c10de03d08dc9665b 9ee3f39a74f22a45b1d71d8c10de03d08dc9665b

2008-03-30T12:24:05-07:00

Added generate_feed_vector and feedlist.txt files. These are used in Chapter 3 to extract term-vectors from RSS feeds as a way of demonstrating the various clustering techniques. 5b09ea0d84fe27f90e41a61ce2251a867cafd532 Alex Vollmer alex.vollmer@gmail.com