Logger should permit per-metric batch domains / missing data

[rsokl]

Users should be able to set nan in their batch

[davidmascharka]

Just so I'm clear, this is changing:

plotter.set_test_batch(test_metrics, batch_size=1)

To something like:

plotter.set_test_batch(test_matrics, batch_sizes=(16, 4)

for two metrics? Or did you have something else in mind?

[rsokl]

Oh no, this is saying that you can record metric-a every iteration and metric-b every 100 iterations. Presently, it is assumed that every metric is recorded concurrently

[davidmascharka]

Ah! Yeah that makes much more sense.