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
