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Author SHA1 Message Date
Stephen Whitworth
9c7049ba89 Merge pull request #90 from Sentimentron/cross-fold-staging 
Cross-fold validation
 2014-11-21 13:53:29 +00:00
Stephen Whitworth
aeb12bd0c7 Merge pull request #99 from Sentimentron/params-staging 
MultiLinearSVC class weights
 2014-11-21 13:53:00 +00:00
Richard Townsend
e30ff6580a ARFF import/export, CSV export, serialisation 
* Only numeric and categorical ARFF attributes are currently supported.
* Only the dense version of the ARFF format is supported.
* Compressed format is .tar.gz file which should allow extensibility.
    * Attributes stored using JSON representations.
* Also offers smarter estimation of the precision of numeric Attributes.
* Also adds support for writing instances to CSV
 2014-11-13 20:09:00 +00:00
Richard Townsend
ec846e62d2 Merge pull request #100 from pontusmelke/use-apply 
Rewrote gradient descent to use Apply for scalar matrix multiplication.
 2014-11-06 09:50:17 +00:00
Pontus Melke
6a04b01f3e Rewrote gradient descent to use Apply for scalar matrix multiplication. 2014-11-06 08:22:18 +01:00
Richard Townsend
8fe06e7332 Support for individual class weightings 2014-10-30 23:28:26 +00:00
Richard Townsend
6929052af0 base: conversion to DenseInstances via DenseCopyOf 2014-10-30 22:10:39 +00:00
Richard Townsend
1e888d2a97 base: More general version of equality 2014-10-30 22:02:38 +00:00
Stephen Whitworth
056ccef9b6 Merge pull request #91 from Sentimentron/numeric-staging 
trees: Handling FloatAttributes.
 2014-10-27 07:56:19 +00:00
Richard Townsend
b2f5b2840d Cross-fold validation 2014-10-26 17:48:48 +00:00
Richard Townsend
7ba57fe6df trees: Handling FloatAttributes. 
This patch adds:

	* Gini index and information gain ratio as
           DecisionTree split options;
	* handling for numeric Attributes (split point
           chosen naïvely on the basis of maximum entropy);
	* A couple of additional utility functions in base/
	* A new dataset (see sources.txt) for testing.

Performance on Iris performs markedly without discretisation.
 2014-10-26 17:40:38 +00:00
Stephen Whitworth
fcb96f1fad Merge pull request #87 from Sentimentron/knn-opt-staging 
Optimised version of KNN for Euclidean distances
 2014-10-12 08:59:40 +01:00
Stephen Whitworth
b3497a9b80 Merge pull request #88 from Sentimentron/linearsvc-staging 
Multi-class linear Support Vector Classifiers
 2014-10-12 08:59:25 +01:00
Stephen Whitworth
b4733d7109 Merge pull request #89 from Sentimentron/go-1.1-fix 
Travis: drop CI support for go 1.1
 2014-10-10 10:39:18 +01:00
Richard Townsend
b33c95a770 Travis: drop CI support for go 1.1 2014-10-05 11:25:46 +01:00
Richard Townsend
981d43f1dd Adds support for multi-class linear SVMs. 
This patch
  * Adds a one-vs-all meta classifier into meta/
  * Adds a LinearSVC (essentially the same as LogisticRegression
    but with different libsvm parameters) to linear_models/
  * Adds a MultiLinearSVC into ensemble/ for predicting
    CategoricalAttribute  classes with the LinearSVC
  * Adds a new example dataset based on classifying article headlines.

The example dataset is drawn from WikiNews, and consists of an average,
min and max Word2Vec representation of article headlines from three
categories. The Word2Vec model was computed offline using gensim.
 2014-10-05 11:15:41 +01:00
Stephen Whitworth
0e4d04af52 Merge pull request #83 from Lupino/master 
move ext source to linear_models for easy build
 2014-10-01 11:08:38 +01:00
Richard Townsend
527c6476e1 Optimised version of KNN for Euclidean distances 
This patch also:
   * Completes removal of the edf/ package
   * Corrects an erroneous print statement
   * Introduces two new CSV functions
      * ParseCSVToInstancesTemplated makes sure that
        reading a second CSV file maintains strict Attribute
        compatibility with an existing DenseInstances
      * ParseCSVToInstancesWithAttributeGroups gives more control
        over where Attributes end up in memory, important for
        gaining predictable control over the KNN optimisation
      * Decouples BinaryAttributeGroup from FixedAttributeGroup for
        better casting support
 2014-09-30 23:10:22 +01:00
Stephen Whitworth
8f1bc62401 Merge pull request #85 from okjake/master 
Small spelling correction
 2014-09-28 09:47:22 +01:00
Jake Pyne
e5da0a8b04 Correct spelling 2014-09-28 01:34:21 +02:00
Ubasic
979c727124 move ext source to linear_models for build static 2014-09-25 16:14:53 +08:00
Stephen Whitworth
fc5eafd82b Merge pull request #82 from Sentimentron/edf-remove 
Edf remove
 2014-09-25 07:32:27 +01:00
Richard Townsend
49e5012b50 Removed base/edf 2014-09-19 23:03:44 +01:00
Richard Townsend
91cfee0e0e Adding a high-dimensional feature set 2014-09-19 23:03:35 +01:00
Stephen Whitworth
65674e2012 Merge pull request #78 from amitkgupta/master 
Convert all tests to Goconvey, ensure all tests make assertions, plus miscellaneous cleanup
 2014-08-25 12:52:53 +01:00
Amit Kumar Gupta
93838e30e3 Revert "Remove hardly-used logger" 
This reverts commit 151df652cab334066826f53d0c7ad8b48c884cae.
 2014-08-25 08:11:36 +00:00
Amit Kumar Gupta
25811f833b Revert "Remove (mostly) unused C print functions in linear package" 
This reverts commit f9e41dec2860090e00dd1e0fb74c1beb79197ae5.
 2014-08-25 08:11:36 +00:00
Amit Kumar Gupta
f9e41dec28 Remove (mostly) unused C print functions in linear package 2014-08-23 05:27:40 +00:00
Amit Kumar Gupta
4d93b9de89 Convert remaining tests to goconvey 2014-08-23 05:22:16 +00:00
Amit Kumar Gupta
9f67f73330 Convert some tests to goconvey, and improve assertions along the way 2014-08-22 13:39:29 +00:00
Amit Kumar Gupta
1809a8b358 RandomForest returns error when fitting data with fewer features than the RandomForest plans to use 
- BaseClassifier Predict and Fit methods return errors
- go fmt ./...

Conflicts:
	ensemble/randomforest.go
	ensemble/randomforest_test.go
	trees/tree_test.go
 2014-08-22 13:39:29 +00:00
Amit Kumar Gupta
151df652ca Remove hardly-used logger 2014-08-22 13:39:29 +00:00
Amit Kumar Gupta
f14020f78c Remove unused cross_validation package 2014-08-22 13:39:29 +00:00
Amit Kumar Gupta
529b3bcaa5 Avoid renaming packages on import 2014-08-22 13:39:29 +00:00
Amit Kumar Gupta
478b5055c7 Remove unused untested utility functions 2014-08-22 13:39:29 +00:00
Amit Kumar Gupta
63dcd653b0 NewLogisticRegression returns error instead of nil to indicate error 2014-08-22 13:39:29 +00:00
Amit Kumar Gupta
f38fc713ef Remove unused untested ParseCSV function 2014-08-22 13:39:29 +00:00
Amit Kumar Gupta
580913938f Trim the public interface of the edf package 2014-08-22 13:39:29 +00:00
Amit Kumar Gupta
947ee8380e Return error instead of panicking when unable to get confusion matrix 2014-08-22 13:39:29 +00:00
Stephen Whitworth
c8bf178662 Merge pull request #76 from amitkgupta/master 
Improve ConfusionMatrix GetSummary formatting, and several tiny improvements
 2014-08-22 11:37:17 +01:00
Amit Kumar Gupta
14aad31821 Consistently use (t *testing.T) instead of T or testEnv 2014-08-22 08:44:41 +00:00
Amit Kumar Gupta
695aec6eb6 Favor idiomatic t.Fatalf over panic for test failures 2014-08-22 08:07:55 +00:00
Amit Kumar Gupta
45545d6ebd Remove Println's from automated test suite since they aren't assertions 2014-08-22 07:58:01 +00:00
Amit Kumar Gupta
66ad866cb3 RandomForest panics when trying to fit data with too few features instead of just hanging forever 2014-08-22 07:39:14 +00:00
Amit Kumar Gupta
d835081de9 Favor idiomatic error return over panic when parsing non-existent CSV file 2014-08-22 07:27:16 +00:00
Amit Kumar Gupta
21bb2fc9fa Remove redundant import renames 2014-08-22 07:21:24 +00:00
Amit Kumar Gupta
8f5a5f4962 Add headings and improve formatting of ConfusionMatrix GetSummary 2014-08-22 07:09:16 +00:00
Amit Kumar Gupta
25f59e2d6b Remove unused private functions from base/util 2014-08-22 07:07:13 +00:00
Amit Kumar Gupta
b8e0a36f73 Remove unused untested private function from chimerge_funcs 2014-08-22 07:03:49 +00:00
Amit Kumar Gupta
688a82babb fix typo suceed -> succeed 2014-08-22 07:00:39 +00:00