added three functions: 1. retrieve_nh , 2.partial_profiles 3.plot_Eprofiles ....
added three functions: 1. retrieve_nh , 2.partial_profiles 3.plot_Eprofiles . Probably function 3 should be put in plottig.py.
added three functions: 1. retrieve_nh , 2.partial_profiles 3.plot_Eprofiles . Probably function 3 should be put in plottig.py.