davidbau

'''
To use a runningstats object,

    1. Create the the desired stat object, e.g., `m = Mean()`
    2. Feed it batches via the add method, e.g., `m.add(batch)`
    3. Repeat step 2 any number of times.
    4. Read out the statistic of interest, e.g., `m.mean()`

Built-in runningstats objects include: