nb2 06_cnn_cuda_hooks_init.ipynb plotting errors

[itsa-mee-mario]

plotting the means and std dev as given in the notebooks, for example:

for o in act_means: plt.plot(o)
plt.legend(range(5));

gives an error as o is a list of lists

to correct this, we can use

for o in act_means: plt.plot(torch.tensor(o))
plt.legend(range(5));