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VowpalWabbit.h
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1 /*
2  * Copyright (c) 2009 Yahoo! Inc. All rights reserved. The copyrights
3  * embodied in the content of this file are licensed under the BSD
4  * (revised) open source license.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * Written (W) 2011 Shashwat Lal Das
12  * Adaptation of Vowpal Wabbit v5.1.
13  * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society.
14  */
15 
16 #ifndef _VOWPALWABBIT_H__
17 #define _VOWPALWABBIT_H__
18 
19 #include <shogun/lib/config.h>
20 
25 
28 
29 namespace shogun
30 {
41 {
42 public:
43 
46 
50  CVowpalWabbit();
51 
59 
64 
69 
74  void reinitialize_weights();
75 
84  void set_no_training(bool dont_train) { no_training = dont_train; }
85 
91  void set_adaptive(bool adaptive_learning);
92 
99  void set_exact_adaptive_norm(bool exact_adaptive);
100 
106  void set_num_passes(int32_t passes)
107  {
108  env->num_passes = passes;
109  }
110 
116  void load_regressor(char* file_name);
117 
124  void set_regressor_out(char* file_name, bool is_text = true);
125 
131  void set_prediction_out(char* file_name);
132 
139  void add_quadratic_pair(char* pair);
140 
146  virtual bool train_machine(CFeatures* feat = NULL);
147 
156 
166 
179  float32_t compute_exact_norm_quad(float32_t* weights, VwFeature& page_feature, v_array<VwFeature> &offer_features,
180  vw_size_t mask, float32_t g, float32_t& sum_abs_x);
181 
188  {
189  SG_REF(env);
190  return env;
191  }
192 
198  virtual const char* get_name() const { return "VowpalWabbit"; }
199 
204  virtual void set_learner();
205 
210 
211 private:
217  virtual void init(CStreamingVwFeatures* feat = NULL);
218 
226  virtual float32_t inline_l1_predict(VwExample* &ex);
227 
235  virtual float32_t inline_predict(VwExample* &ex);
236 
244  virtual float32_t finalize_prediction(float32_t ret);
245 
251  virtual void output_example(VwExample* &ex);
252 
258  virtual void print_update(VwExample* &ex);
259 
268  virtual void output_prediction(int32_t f, float32_t res, float32_t weight, v_array<char> tag);
269 
275  void set_verbose(bool verbose);
276 
277 protected:
280 
283 
286 
289 
290 private:
292  bool quiet;
293 
295  bool no_training;
296 
298  float32_t dump_interval;
300  float32_t sum_loss_since_last_dump;
302  float64_t old_weighted_examples;
303 
305  char* reg_name;
307  bool reg_dump_text;
308 
310  bool save_predictions;
312  int32_t prediction_fd;
313 };
314 
315 }
316 #endif // _VOWPALWABBIT_H__

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