How to export figures to files from IPython Notebook

try this (note that the files get saved to the default notebook folder):

plot(range(80))
xlabel('foo')
ylabel('bar')
legend(['myline'])
axis([0, 80, 0, 120])
savefig('sample.pdf')

if you want png just change it to 'sample.png'.

Note that the savefig() call should be in the same notebook cell as the plotting commands.