New in version 1.1.
Change named chromatic pitches to harmonic chromatic interval-class number dictionary:
abjad> chord = Chord([0, 2, 11], (1, 4))
abjad> vector = pitchtools.named_chromatic_pitches_to_harmonic_chromatic_interval_class_number_dictionary(chord.written_pitches)
abjad> vector
{0: 0, 1: 0, 2: 1, 3: 0, 4: 0, 5: 0, 6: 0, 7: 0, 8: 0, 9: 1, 10: 0, 11: 1}
Return dictionary.
Changed in version 2.0: renamed pitchtools.get_interval_vector() to pitchtools.named_chromatic_pitches_to_harmonic_chromatic_interval_class_number_dictionary().