This the source code for the Multiclass Probability Estimation with Support Vector Machine. The working environment is MATLAB, to run this code, users also need to install Tomlab (https://tomopt.com/tomlab/). A training data called train_data.txt should be saved under the the same directory. The data saved in the training data should be a 2-D matrix with the first column as the classes and the rest should be the variables. A test data called test_data.txt should be saved under the same directory. The data format in the test data should be a 2-D matrix which only contain variables. To run the code, simply run Multi_Prob_SVM.m file.