This function is used to test the trained neural network.
y = ANN_test(in1);
class guessed by the neural network
test sample values (excluding the label column.)
Upon calling this function, a dialog box will open which will ask you to choose the model file which has been saved to disk after training completion by ANN_train(). The model files are saved inside the 'models' folder It is of the format 'neural_network ###.ml'.