Evaluate FIS using ANFIS in MATLAB

I have an Input/Output data set with 4 inputs and one output and contains mix of right and wrong values, i want to classify this data set. i am already build an FIS using ANFIS in MATLAB in GUI mode, and do the training for the data set. but in fact i don't understand the result of training. and what the next step to measure the accuracy of the system? I need your help please !