def displayArray(name, a, width = 0):
    """
    Prints an array (any sequence of floats, really) to the screen.
    """
    print(name + ": ", end=" ")
    cnt = 0
    for i in a:
        print("%4.2f" % i, end=" ")
        if width > 0 and (cnt + 1) % width == 0:
            print('')
        cnt += 1