Matrix Confusion

Hello, I am newbie using cluto, I have seen the tutorial, but I could not find how to calculate the matrix confusion.
I want a file with the same information that is being showed in the output (the confusion matrix), is it possible?. I only am getting a file with the list with the cluster number that the ith object/row belongs to. With the confusion matrix, I am going to be able of calculating recall and precision easier.
Thanks in advance.