Xtick para Axvline
ax.axvline(4.5, color='red')
ax.text(4.5, -.05, 'COG', color='red', transform=ax.get_xaxis_transform(),
ha='center', va='top')
Real Raccoon
ax.axvline(4.5, color='red')
ax.text(4.5, -.05, 'COG', color='red', transform=ax.get_xaxis_transform(),
ha='center', va='top')