Decide if max or last for structured example

[ebenp]

Currently the plugin uses the max timestep versus the last timestep.

# get max along the 2nd axis (time)
data_wecs_max = np.amax(data_wecs, axis = 1, keepdims = True)

# get last axis value
# data_wecs_max = data_wecs[:,[-1],:,:]

We should decide which one to use.