Section: User Commands (1)Updated: February 2011Local indexUp
NAME
vw - Vowpal Wabbit -- fast online learning tool
DESCRIPTION
VW options:
--active_learning
active learning mode
--active_simulation
active learning simulation mode
--active_mellowness arg (=8)
active learning mellowness parameter c_0.
Default 8
--adaptive
use adaptive, individual learning rates.
-a [ --audit ]
print weights of features
-b [ --bit_precision ] arg
number of bits in the feature table
--backprop
turn on delayed backprop
-c [ --cache ]
Use a cache. The default is <data>.cache
--cache_file arg
The location(s) of cache_file.
--compressed
use gzip format whenever appropriate. If a
cache file is being created, this option
creates a compressed cache file. A mixture
of raw-text & compressed inputs are
supported if this option is on
--conjugate_gradient
use conjugate gradient based optimization
--regularization arg (=0)
minimize weight magnitude
--corrective
turn on corrective updates
-d [ --data ] arg
Example Set
--daemon
read data from port 39523
--decay_learning_rate arg (=1)
Set Decay factor for learning_rate between
passes
-f [ --final_regressor ] arg
Final regressor
--global_multiplier arg (=1)
Global update multiplier
--delayed_global
Do delayed global updates
--hash arg
how to hash the features. Available options:
strings, all
-h [ --help ]
Output Arguments
--version
Version information
--initial_weight arg (=0)
Set all weights to an initial value of 1.
-i [ --initial_regressor ] arg
Initial regressor(s)
--initial_t arg (=1)
initial t value
--lda arg
Run lda with <int> topics
--lda_alpha arg (=0.100000001)
Prior on sparsity of per-document topic
weights
--lda_rho arg (=0.100000001)
Prior on sparsity of topic distributions
--lda_D arg (=10000)
Number of documents
--minibatch arg (=1)
Minibatch size, for LDA
--min_prediction arg
Smallest prediction to output
--max_prediction arg
Largest prediction to output
--multisource arg
multiple sources for daemon input
--noop
do no learning
--port arg
port to listen on
--power_t arg (=0.5)
t power value
--predictto arg
host to send predictions to
-l [ --learning_rate ] arg (=10) Set Learning Rate
--passes arg (=1)
Number of Training Passes
-p [ --predictions ] arg
File to output predictions to
-q [ --quadratic ] arg
Create and use quadratic features
--quiet
Don't output diagnostics
--random_weights arg
make initial weights random
-r [ --raw_predictions ] arg
File to output unnormalized predictions to
--sendto arg
send example to <hosts>
-t [ --testonly ]
Ignore label information and just test
--thread_bits arg (=0)
log_2 threads
--loss_function arg (=squared)
Specify the loss function to be used, uses
squared by default. Currently available ones
are squared, hinge, logistic and quantile.
--quantile_tau arg (=0.5)
Parameter \tau associated with Quantile
loss. Defaults to 0.5
--unique_id arg (=0)
unique id used for cluster parallel
--sort_features
turn this on to disregard order in which
features have been defined. This will lead
to smaller cache sizes
--ngram arg
Generate N grams
--skips arg
Generate skips in N grams. This in
conjunction with the ngram tag can be used
to generate generalized n-skip-k-gram.