Create_simulated_data   Create an example dataset for testing the MTL
                        algorithm
MTL                     Train a multi-task learning model.
calcError               Calculate the prediction error
cvMTL                   K-fold cross-validation
plot.cvMTL              Plot the cross-validation curve
plotObj                 Plot the historical values of objective
                        function
predict.MTL             Predict the outcomes of new individuals
print.MTL               Print the meta information of the model
