h2 = axes2.hist2d(firstedits_female, birth_years_female, range=[[min_firstedit, max_firstedit], [1750, 2014]], bins=50)
figure.colorbar(h2[3])
axes2.xaxis.set_major_formatter(dates.AutoDateFormatter(dates.AutoDateLocator()))
h2 = axes2.hist2d(firstedits_female, birth_years_female, range=[[min_firstedit, max_firstedit], [1750, 2014]], bins=50)
figure.colorbar(h2[3])
axes2.xaxis.set_major_formatter(dates.AutoDateFormatter(dates.AutoDateLocator()))