Deprecated since version 2.0: axes.hold is deprecated. See the API Changes document (http://matplotlib.org/api/api_changes.html) for more details.
Set the hold state
hold mechanism is deprecated and will be removed in
v3.0. The behavior will remain consistent with the
long-time default value of True.
If hold is None (default), toggle the hold state. Else set the hold state to boolean value b.
# toggle hold hold() # turn hold on hold(True) # turn hold off hold(False)
When hold is True, subsequent plot commands will be added to the current axes. When hold is False, the current axes and figure will be cleared on the next plot command