h1 = axes1.hist2d(firstedits_male, birth_years_male, range=[[min_firstedit, max_firstedit], [1750, 2014]], bins=50)
figure.colorbar(h1[3])
axes1.xaxis.set_major_formatter(dates.AutoDateFormatter(dates.AutoDateLocator()))
+axes1.set_title('Male')
firstedits_female = dates.date2num(wikibios.columns_female['firstedit'])
birth_years_female = wikibios.columns_female['birth_year']
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()))
+axes2.set_title('Female')
figure.savefig('hist2d.png')