svm-predict(1) User Manuals svm-predict(1)
NAME
svm-predict - make predictions based on a trained SVM model file and
test data
SYNOPSIS
svm-predict [ -b probability_estimates ] [ -q ] test_data model_file [
output_file ]
DESCRIPTION
svm-predict uses a Support Vector Machine specified by a given input
model_file to make predictions for each of the samples in test_data
The format of this file is identical to the training_data file used
in svm_train(1) and is just a sparse vector as follows:
<label> <index1>:<value1> <index2>:<value2> . . .
.
.
.
There is one sample per line. Each sample consists of a target value
(label or regression target) followed by a sparse representation of the
input vector. All unmentioned coordinates are assumed to be 0. For
classification, <label> is an integer indicating the class label
(multi-class is supported). For regression, <label> is the target value
which can be any real number. For one-class SVM, it's not used so can
be any number. Except using precomputed kernels (explained in another
section), <index>:<value> gives a feature (attribute) value. <index>
is an integer starting from 1 and <value> is a real number. Indices
must be in an ASCENDING order. If you have label data available for
testing then you can enter these values in the test_data file. If they
are not available you can just enter 0 and will not know real accuracy
for the SVM directly, however you can still get the results of its pre-
diction for the data point.
If output_file is given, it will be used to specify the filename
to store the predicted results, one per line, in the same order
as the test_data file.
OPTIONS
-b probability-estimates
probability_estimates is a binary value indicating whether to
calculate probability estimates when training the SVC or SVR
model. Values are 0 or 1 and defaults to 0 for speed.
-q quiet mode; suppress messages to stdout.
FILES
training_set_file must be prepared in the following simple sparse
training vector format:
<label> <index1>:<value1> <index2>:<value2> . . .
.
.
.
There is one sample per line. Each sample consist of a target value
(label or regression target) followed by a sparse representation of the
input vector. All unmentioned coordinates are assumed to be 0. For
classification, <label> is an integer indicating the class label
(multi-class is supported). For regression, <label> is the target value
which can be any real number. For one-class SVM, it's not used so can
be any number. Except using precomputed kernels (explained in another
section), <index>:<value> gives a feature (attribute) value. <index>
is an integer starting from 1 and <value> is a real number. Indices
must be in an ASCENDING order.
ENVIRONMENT
No environment variables.
DIAGNOSTICS
None documented; see Vapnik et al.
BUGS
Please report bugs to the Debian BTS.
AUTHOR
Chih-Chung Chang, Chih-Jen Lin <cjlin@csie.ntu.edu.tw>, Chen-Tse Tsai
<ctse.tsai@gmail.com> (packaging)
SEE ALSO
svm-train(1), svm-scale(1)
Linux MAY 2006 svm-predict(1)
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