Hi! How can I store such arrays: A 1 2.3 1.2 3 d 1.2 B 4 2.3 5.2 3 c 1.2 A 1 2.3 ? 3 e 1.2 using NumPy with support for basic functions: sum, max, min. Is it possible? If not, how I can do this in effective way? Thanks for help Peter