CODEWITHSUNDEEP
matlablibsvm
gbalcisoy
gbalcisoy

Reputation: 127

libsvm svmpredict method output model file

I use libsvm svmpredict method for classifying the images on Matlab. I need svmpredict method's output model file that has extension with ".model". But I cannot create it. My usage is that,

model = svmtrain(train_label_set_libsvmformat, train_data_set_libsvmformat, '-t 2 -c 0.3 -g 0.01');
[predict_label, accuracy, prob_values] = svmpredict(test_label_set_libsvmformat, test_data_set_libsvmformat, model, 'output.model');

I wait for creating this file "output.model", but it doesn't exist. Is there anything that is wrong for me?

Upvotes: 2

Views: 6841

Answers (1)

Sentry
Sentry

Reputation: 4113

From https://sites.google.com/site/kittipat/libsvm_matlab

% Train the SVM
model = svmtrain(trainLabel, trainData, '-c 1 -g 0.07 -b 1');
% Use the SVM model to classify the data
[predict_label, accuracy, prob_values] = svmpredict(testLabel, testData, model, '-b 1'); % run the SVM model on the test data

The last argument of svmpredict is not a filename, but the options you want to pass to svmpredict. If you want to save a model to a file, this usually is done when training the model in svmtrain. If you use the command line version of svm-train, the model-file is an additional parameter.

From what I make of the source code of libsvm for MATLAB, the model you get from executing the svmtrain command is just a scalar in MATLAB, so there is no built-in way to obtain a model-file.

If you want a model-file, you have to use the command line version of libsvm.

Upvotes: 2

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