Class CVwEnvironment is the environment used by VW.
Contains global constants and settings which change the behaviour of Vowpal Wabbit.
It is used while parsing input, and also while learning.
One CVwEnvironment object should be bound to the CStreamingVwFile or CStreamingVwCacheFile, and the pointer to it propagated upwards to CStreamingVwFeatures and finally to CVowpalWabbit.
Definition at line 39 of file VwEnvironment.h.
Public Member Functions | |
CVwEnvironment () | |
virtual | ~CVwEnvironment () |
void | set_num_bits (vw_size_t bits) |
vw_size_t | get_num_bits () |
void | set_mask (vw_size_t m) |
vw_size_t | get_mask () |
float64_t | get_min_label () |
float64_t | get_max_label () |
vw_size_t | num_threads () |
vw_size_t | length () |
void | set_stride (vw_size_t new_stride) |
virtual const char * | get_name () const |
Public Attributes | |
vw_size_t | num_bits |
log_2 of the number of features | |
vw_size_t | thread_bits |
log_2 of the number of threads | |
vw_size_t | mask |
Mask used for hashing. | |
vw_size_t | thread_mask |
Mask used by regressor for learning. | |
vw_size_t | stride |
Number of elements in weight vector per feature. | |
float64_t | min_label |
Smallest label seen. | |
float64_t | max_label |
Largest label seen. | |
float32_t | eta |
Learning rate. | |
float32_t | eta_decay_rate |
Decay rate of eta per pass. | |
bool | adaptive |
Whether adaptive learning is used. | |
bool | exact_adaptive_norm |
Whether exact norm is used for adaptive learning. | |
float32_t | l1_regularization |
Level of L1 regularization. | |
bool | random_weights |
Whether to use random weights. | |
float32_t | initial_weight |
Initial value of all elements in weight vector. | |
float32_t | update_sum |
Sum of updates. | |
float32_t | t |
Value of t. | |
float64_t | initial_t |
Initial value of t. | |
float32_t | power_t |
t power value while updating | |
int64_t | example_number |
Example number. | |
float64_t | weighted_examples |
Weighted examples. | |
float64_t | weighted_unlabeled_examples |
Weighted unlabelled examples. | |
float64_t | weighted_labels |
Weighted labels. | |
vw_size_t | total_features |
Total number of features. | |
float64_t | sum_loss |
Sum of losses. | |
vw_size_t | passes_complete |
Number of passes complete. | |
vw_size_t | num_passes |
Number of passes. | |
vw_size_t | ngram |
ngrams to generate | |
vw_size_t | skips |
Skips in ngrams. | |
bool | ignore_some |
Whether some namespaces are ignored. | |
bool | ignore [256] |
Which namespaces to ignore. | |
DynArray< char * > | pairs |
Pairs of features to cross for quadratic updates. | |
const char * | vw_version |
VW version. | |
vw_size_t | v_length |
Length of version string. |
CVwEnvironment | ( | ) |
Default constructor Should initialize with reasonable default values
Definition at line 19 of file VwEnvironment.cpp.
virtual ~CVwEnvironment | ( | ) | [virtual] |
Destructor
Definition at line 51 of file VwEnvironment.h.
vw_size_t get_mask | ( | ) |
float64_t get_max_label | ( | ) |
float64_t get_min_label | ( | ) |
virtual const char* get_name | ( | void | ) | const [virtual] |
Return the name of the object
Implements CSGObject.
Definition at line 114 of file VwEnvironment.h.
vw_size_t get_num_bits | ( | ) |
Return number of bits used for weight vector
Definition at line 63 of file VwEnvironment.h.
vw_size_t length | ( | ) |
Return length of weight vector
Definition at line 99 of file VwEnvironment.h.
vw_size_t num_threads | ( | ) |
Return number of threads used for learning
Definition at line 93 of file VwEnvironment.h.
void set_mask | ( | vw_size_t | m | ) |
Set mask used while accessing features
m | mask |
Definition at line 69 of file VwEnvironment.h.
void set_num_bits | ( | vw_size_t | bits | ) |
Set number of bits used for the weight vector
bits | number of bits |
Definition at line 57 of file VwEnvironment.h.
void set_stride | ( | vw_size_t | new_stride | ) |
Set a new stride value. Also changes thread_mask.
new_stride | new value of stride |
Definition at line 69 of file VwEnvironment.cpp.
bool adaptive |
Whether adaptive learning is used.
Definition at line 145 of file VwEnvironment.h.
Learning rate.
Definition at line 140 of file VwEnvironment.h.
Decay rate of eta per pass.
Definition at line 142 of file VwEnvironment.h.
bool exact_adaptive_norm |
Whether exact norm is used for adaptive learning.
Definition at line 147 of file VwEnvironment.h.
int64_t example_number |
Example number.
Definition at line 167 of file VwEnvironment.h.
bool ignore[256] |
Which namespaces to ignore.
Definition at line 191 of file VwEnvironment.h.
bool ignore_some |
Whether some namespaces are ignored.
Definition at line 189 of file VwEnvironment.h.
Initial value of t.
Definition at line 162 of file VwEnvironment.h.
Initial value of all elements in weight vector.
Definition at line 154 of file VwEnvironment.h.
Level of L1 regularization.
Definition at line 149 of file VwEnvironment.h.
Mask used for hashing.
Definition at line 128 of file VwEnvironment.h.
Largest label seen.
Definition at line 137 of file VwEnvironment.h.
Smallest label seen.
Definition at line 135 of file VwEnvironment.h.
ngrams to generate
Definition at line 184 of file VwEnvironment.h.
log_2 of the number of features
Definition at line 124 of file VwEnvironment.h.
Number of passes.
Definition at line 181 of file VwEnvironment.h.
Pairs of features to cross for quadratic updates.
Definition at line 194 of file VwEnvironment.h.
Number of passes complete.
Definition at line 179 of file VwEnvironment.h.
t power value while updating
Definition at line 164 of file VwEnvironment.h.
bool random_weights |
Whether to use random weights.
Definition at line 152 of file VwEnvironment.h.
Skips in ngrams.
Definition at line 186 of file VwEnvironment.h.
Number of elements in weight vector per feature.
Definition at line 132 of file VwEnvironment.h.
Sum of losses.
Definition at line 177 of file VwEnvironment.h.
Value of t.
Definition at line 160 of file VwEnvironment.h.
log_2 of the number of threads
Definition at line 126 of file VwEnvironment.h.
Mask used by regressor for learning.
Definition at line 130 of file VwEnvironment.h.
Total number of features.
Definition at line 175 of file VwEnvironment.h.
Sum of updates.
Definition at line 157 of file VwEnvironment.h.
Length of version string.
Definition at line 199 of file VwEnvironment.h.
const char* vw_version |
VW version.
Definition at line 197 of file VwEnvironment.h.
Weighted examples.
Definition at line 169 of file VwEnvironment.h.
Weighted labels.
Definition at line 173 of file VwEnvironment.h.
Weighted unlabelled examples.
Definition at line 171 of file VwEnvironment.h.