var in hello_world.py

[sabertwirl]

Thank you a lot for the excellent codes and the paper. I would like to ask if the variable var in the function plot_predictions in hello_world.py is actually standard deviation? And if it only contains epistemic error? If so, how to implement aleatoric uncertainty in the same code.

[HareshKarnan]

equation 5 in the paper says this is epistemic error