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cjlin1 / libsvm

LIBSVM -- A Library for Support Vector Machines
https://www.csie.ntu.edu.tw/~cjlin/libsvm/
BSD 3-Clause "New" or "Revised" License
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matlab regression bug #144

Open yujianyuanhaha opened 5 years ago

yujianyuanhaha commented 5 years ago

is regression implemented in matlab?

model = svmtrain(training_label_vector, training_instance_matrix,...
    's 3 p 0.1 t 0 nr_class 2');

[predicted_label] = svmpredict(testing_label_vector,  ...
                                testing_instance_matrix, ...
                                model, 's 3 p 0.1 t 0');

the predicted_label is always zero for me, with warning

WARNING: training data in only one class. See README for details.
Total nSV = 0
Elapsed time is 0.007730 seconds.
Accuracy = 0% (0/301) (classification)

btw, I have normalize the label to range [0,1] already

cjlin1 commented 5 years ago

Your parameter string is incorrect. You need -s 3 -p 0.1 etc. Also there is no option nr_class

On 2019-07-09 12:50, Jet Yu wrote:

is regression implemented in matlab?

model = svmtrain(training_label_vector, training_instance_matrix,... 's 3 p 0.1 t 0 nr_class 2');

[predicted_label] = svmpredict(testing_label_vector, ... testing_instance_matrix, ... model, 's 3 p 0.1 t 0');

the predicted_label is always zero for me, with warning

WARNING: training data in only one class. See README for details. Total nSV = 0 Elapsed time is 0.007730 seconds. Accuracy = 0% (0/301) (classification)

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