.\" Text automatically generated by txt2man
.TH mlpack_nbc 1 "18 November 2018" "mlpack-3.0.4" "User Commands"
.SH NAME
\fBmlpack_nbc \fP- parametric naive bayes classifier
.SH SYNOPSIS
.nf
.fam C
 \fBmlpack_nbc\fP [\fB-I\fP \fIbool\fP] [\fB-m\fP \fIunknown\fP] [\fB-l\fP \fIstring\fP] [\fB-T\fP \fIstring\fP] [\fB-t\fP \fIstring\fP] [\fB-V\fP \fIbool\fP] [\fB-o\fP \fIstring\fP] [\fB-M\fP \fIunknown\fP] [\fB-p\fP \fIstring\fP] [\fB-h\fP \fB-v\fP] 
.fam T
.fi
.fam T
.fi
.SH DESCRIPTION


This program trains the Naive Bayes classifier on the given labeled training
set, or loads a model from the given model file, and then may use that trained
model to classify the points in a given test set.
.PP
The training set is specified with the '\fB--training_file\fP (\fB-t\fP)' parameter. 
Labels may be either the last row of the training set, or alternately the
\(cq\fB--labels_file\fP (\fB-l\fP)' parameter may be specified to pass a separate matrix of
labels.
.PP
If training is not desired, a pre-existing model may be loaded with the
\(cq\fB--input_model_file\fP (\fB-m\fP)' parameter.
.RE
.PP


.RS
The '\fB--incremental_variance\fP (\fB-I\fP)' parameter can be used to force the training
to use an incremental algorithm for calculating variance. This is slower, but
can help avoid loss of precision in some cases.
.PP
If classifying a test set is desired, the test set may be specified with the
\(cq\fB--test_file\fP (\fB-T\fP)' parameter, and the classifications may be saved with the
\(cq\fB--output_file\fP (\fB-o\fP)' output parameter. If saving the trained model is
desired, this may be done with the '\fB--output_model_file\fP (\fB-M\fP)' output
parameter.
.PP
For example, to train a Naive Bayes classifier on the dataset 'data.csv' with
labels 'labels.csv' and save the model to 'nbc_model.bin', the following
command may be used:
.PP
$ nbc \fB--training_file\fP data.csv \fB--labels_file\fP labels.csv \fB--output_model_file\fP
nbc_model.bin
.PP
Then, to use 'nbc_model.bin' to predict the classes of the dataset
\(cqtest_set.csv' and save the predicted classes to 'predictions.csv', the
following command may be used:
.PP
$ nbc \fB--input_model_file\fP nbc_model.bin \fB--test_file\fP test_set.csv \fB--output_file\fP
predictions.csv
.RE
.PP

.SH OPTIONAL INPUT OPTIONS 

.TP
.B
\fB--help\fP (\fB-h\fP) [\fIbool\fP]
Default help info. 
.TP
.B
\fB--incremental_variance\fP (\fB-I\fP) [\fIbool\fP]
The variance of each class will be calculated incrementally. 
.TP
.B
\fB--info\fP [\fIstring\fP]
Get help on a specific module or option.  Default value ''. 
.TP
.B
\fB--input_model_file\fP (\fB-m\fP) [\fIunknown\fP]
Input Naive Bayes model. Default value ''. 
.TP
.B
\fB--labels_file\fP (\fB-l\fP) [\fIstring\fP]
A file containing labels for the training set.  Default value ''. 
.TP
.B
\fB--test_file\fP (\fB-T\fP) [\fIstring\fP]
A matrix containing the test set. Default value ''. 
.TP
.B
\fB--training_file\fP (\fB-t\fP) [\fIstring\fP]
A matrix containing the training set. Default value ''. 
.TP
.B
\fB--verbose\fP (\fB-v\fP) [\fIbool\fP]
Display informational messages and the full list of parameters and timers at the end of execution. 
.TP
.B
\fB--version\fP (\fB-V\fP) [\fIbool\fP]
Display the version of mlpack.  
.SH OPTIONAL OUTPUT OPTIONS 

.TP
.B
\fB--output_file\fP (\fB-o\fP) [\fIstring\fP]
The matrix in which the predicted labels for the test set will be written. Default value ''. 
.TP
.B
\fB--output_model_file\fP (\fB-M\fP) [\fIunknown\fP]
File to save trained Naive Bayes model to.  Default value ''. 
.TP
.B
\fB--output_probs_file\fP (\fB-p\fP) [\fIstring\fP]
The matrix in which the predicted probability of labels for the test set will be written.  Default value ''.
.SH ADDITIONAL INFORMATION

For further information, including relevant papers, citations, and theory,
consult the documentation found at http://www.mlpack.org or included with your
distribution of mlpack.